How Discarded Orange Peels Transformed a Barren Landscape Into a Lush Forest
By Marlene Cimons
Orange isn't just the new black. It's also the new green. Twenty years ago, an orange juice producer dumped thousands of tons of orange peels and pulp onto a barren section of a Costa Rican national park, which has since transformed into a lush, vine-laden woodland. The shift is a dramatic illustration of how agricultural waste can regenerate a forest and sequester vast sums of carbon—for free.
Even more remarkable, it was an accident.
"I was totally floored," said Timothy Treuer, a Princeton University researcher and lead author of a new study published in the journal Restoration Ecology about the rejuvenated forest. "The area that received the orange peels was divided from the [area that did not receive the peels] by a single track dirt road, but the two areas looked like completely different ecosystems."
On one side was a pasture "with a few scattered scraggly trees," he said. On the other, "was an overgrown jungle, so lush it required a machete to move through. Once I was done picking my jaw up off the ground, I realized that I was looking at something truly special. It blew my mind."
Scientists have long worried about the impact of food production on climate change. So they are devising new ways to use food waste that might otherwise end up in a landfill, where it would decompose into methane, a powerful greenhouse gas. The goal is to create new products from the waste, whether they be foods, clothes, farms or—in this case—forest.
"Tropical forests are a part of our species' collective cultural and natural heritage," said Jonathan Choi, a co-author who studied the region while a senior at Princeton University majoring in ecology and evolutionary biology. "While we obviously want to protect every forest that remains on this planet, the idea that we might be able to help regrow the forest that we've lost in a way that saves everyone money is exciting."
Here's what happened.
During the 1990s, 1,000 truckloads of peels and pulp amounting to 12,000 metric tons were deposited as part of a deal struck with Del Oro, an orange juice manufacturer that had just begun production along a northern border of Costa Rica's Área de Conservación Guanacaste, a national park.
In the mid-1990s, 1,000 truckloads of orange peels and pulp were unloaded onto a barren pasture in a Costa Rican national park. Today, that area is covered in forest.Daniel Janzen and Winnie Hallwachs / University of Pennsylvania
A husband and wife team, Daniel Janzen and Winnie Hallwachs, both ecologists at the University of Pennsylvania—who also worked in the park as researchers and technical advisers—offered the company the opportunity to dump their orange waste on degraded land if Del Oro would donate part of their own forested land to the national park. The company, which had considered building an expensive facility to safely deal with the waste, readily agreed. After first extracting the oils and acids—which are commercially valuable in household cleaning products—the process began.
But, a year after the contract was signed—and the peels and pulp were left on the land—a rival fruit company, TicoFruit, sued to stop the process, arguing that Del Oro had "defiled a national park." The Costa Rican Supreme Court agreed, halting the dumping. The land was pretty much forgotten over the ensuing years.
In 2013, while Treuer was discussing possible research projects with Janzen, they talked about the site in Costa Rica, wondering whether it was time to take look. On a subsequent research trip to Costa Rica, Treuer decided to stop by.
"It took me two trips to the site to actually figure out where it was," he recalled. "It didn't help that the six foot long sign with bright yellow lettering marking the site was so overgrown with vines that we literally didn't find it until years later after dozens and dozens of site visits."
The research team evaluated two sets of soil samples to determine whether the orange peels were responsible for enriching the soil's nutrients. "Essentially we took a measuring tape, stretched it out 100 meters, and measured and identified every tree with three meters of the tape," Treuer explained. "We did this three times in the fertilized area, laying the tape out in parallel lines 25 meters apart, and three times in the unfertilized area on the other side of the dirt road."
They looked at changes in tree growth and soil nutrients between the orange peel site and an abandoned pasture that was 100 yards away. They found dramatic differences between the two studied areas; the land fertilized by the orange peels had richer soil, more tree biomass, a greater variety of tree species and a larger forest canopy closure.
Orange peels and pulp left nutrients in the soil. Daniel Janzen and Winnie Hallwachs / University of Pennsylvania
"One of the most surprising results of our tree survey was the number, size and diversity of trees in the area treated with orange peels," Treuer said. "I was expecting a field of Cecropia—a fast-growing 'pioneer' species that often pops up along roadsides and heavily disturbed areas—but two of the most common species were [those] associated with old-growth forests. One of the fig trees we measured was already so large it would have taken three people to wrap their arms all the way around it.
"The diversity was even more striking when compared to the control area that hadn't been treated with orange peels, where just two pasture-associated species made up the vast majority of trees," he added.
How did the orange peels work their magic?
"That's the million dollar question that we don't yet have the answer to," Treuer said. "I strongly suspect that it was some synergy between suppression of the invasive grass and rejuvenation of heavily degraded soils. There's plenty of evidence of both of those factors limiting forest recovery in other parts of the tropics."
Choi agreed. "We'll unfortunately never know what the exact mechanisms for regrowth were in this system, given that we don't have data from before the oranges," he said. "But we imagine that putting this amount of orange peel on the system both infused a ton of nutrients into the soil, and suppressed an invasive grass that was preventing the growth of additional trees."
The researchers hope that the insights gained from this unintentional experiment will inspire more collaboration in the future between the private sector and the environmental community.
"We live in a paradoxical world where nutrient starved degraded lands and nutrient-rich waste streams occur simultaneously," Treuer said. "Resolving that paradox means profits for private industry, more resources for conservation areas, and potentially gigatonnes of climate change-causing gases getting sucked out of the atmosphere.
"This wasn't just a win-win partnership between a business and a park," he added. "It turned out to be a win-win-win blueprint, where the biggest winners are everyone who cares about handing off as healthy and robust an environment to their kids as they inherited from their parents."
Reposted with permission from our media associate Nexus Media.
Reduce. Reuse. Recycle. According to The National Museum of American History, this popular slogan, with its iconic three arrows forming a triangle, embodied a national call to action to save the environment in the 1970s. In that same decade, the first Earth Day happened, the EPA was formed and Congress passed the Resource Conservation and Recovery Act, encouraging recycling and conservation of resources, Enviro Inc. reported.
According to Forbes, the Three R's sustainability catch-phrase, and the recycling cause it bolstered, remain synonymous with the U.S. environmental movement itself. There's only one problem: despite being touted as one of the most important personal actions that individuals can take to help the planet, "recycling" – as currently carried out in the U.S. – doesn't work and doesn't help.
Turns out, there is a vast divide between the misleading, popular notion of recycling as a "solution" to the American overconsumption problem and the darker reality of recycling as a failing business model.
The Myth: Recycling Began as a Plastics' Industry Marketing Tactic
A recycling dumpster in Los Angeles. Citizen of the Planet / Education Images / Universal Images Group / Getty Images
When it was first introduced, recycling likely had altruistic motivations, Forbes reported. However, the system that emerged was never equipped to handle high volumes. Unfortunately, as consumption increased, so too did promotion of recycling as a solution. The system "[gave] manufacturers of disposable items a way to essentially market overconsumption as environmentalism," Forbes reported. Then and now, "American consumers assuage any guilt they might feel about consuming mass quantities of unnecessary, disposable goods by dutifully tossing those items into their recycling bins and hauling them out to the curb each week."
Little has changed since that Forbes article, titled "Can Recycling Be Bad For The Environment?," was published almost a decade ago; increases in recycling have been eclipsed by much higher consumption rates. In fact, consumerism was at an all-time high in January 2020 before the pandemic hit, Trading Economics reported.
But, if the system doesn't work, why does it continue? Turns out, consumers were misled – by the oil and gas industry. News reports from September 2020 revealed how the plastic industry-funded ads in the 1980s that heralded recycling as a panacea to our growing waste problem. These makers of virgin plastics were the biggest proponents and financial sponsors of plastic recycling programs because they created the illusion of a sustainable, closed-cycle while actually promoting the continued use of raw materials for new single-use plastics.
To the masses, these programs justified overconsumption and eased concerns over trash that could be thrown into recycling bins, Forbes reported. Generations of well-meaning Americans since the 1970's and '80's – believing these communications masterminds – have dutifully used-then-recycled plastics and other materials. They trusted that their discards would be reborn as new goods instead of ending up in oceans and landfills.
The plastics industry went even further, lobbying 40 states to put the recycling triangle symbol on all plastic – even if it wasn't recyclable, Houston Public Media reported. This bolstered the public image of plastic as a renewable resource, but the cost was clarity about what actually can be recycled. As recent as 2020, a Greenpeace report found that many U.S. products labeled as recyclable could not actually be processed by most domestic material recovery facilities.
The Reality: Most Recyclables Aren't Being Recycled
An initial pre-sort removes contaminates, items that can't be recycled, at Republic Services in Anaheim, California on Thursday, April 15, 2021. Paul Bersebach / MediaNews Group / Orange County Register / Getty Images
The U.S. relies on single-stream recycling systems, in which recyclables of all sorts are placed into the same bin to be sorted and cleaned at recycling facilities. Well-meaning consumers are often over-inclusive, hoping to divert trash from landfills. Unfortunately, the trash often ends up there anyways – with the additional cost of someone at a recycling plant sorting through it.
The single-stream system is easier on consumers, but results in a mixed stream of materials that is easy to contaminate, hard to sort and more expensive to process. There are a variety of items – including dirty pizza boxes, old clothing, hangers, plastic bags, aerosols, batteries and electronics – that, if added to a residential recycling bin, will contaminate the entire batch of recyclables, a Miami recycling center representative told EcoWatch. At that point, it can be too costly and too dangerous for employees to hand-pick out erroneous items. Because these items cannot be processed in the same way as recyclable materials, their inclusion often means the whole batch will fetch a lower price from buyers or must be thrown away.
"Most people have the attitude that if they just put it in the blue bin, it will get taken away and somebody will figure out what to do with it, but putting something in the blue bin and actually recycling it are two very different things," said David Biderman, CEO and executive director of the Solid Waste Association of North America.
Misunderstandings, misinformation and mislabeling aside, the harsh reality was and remains that most plastic can't and won't be recycled, reported NPR. For example, the EPA reported that plastic generation in 2018 was 35.7 million tons, accounting for 12.2 percent of municipal solid waste (MSW) that year. Of this total, only three million tons were recycled (an 8.7 percent recycling rate). The vast majority – 27 million tons – ended up in landfills, and the rest was combusted. The environmental agency also estimated that less than 10 percent of plastic thrown in bins in the last 40 years has actually been recycled.
The situation is slightly better for other recyclables, though they make up a smaller percentage of MSW. For example, glass products totaled 12.3 million tons in 2018, or 4.2 percent of the annual MSW generation. Almost 25 percent of glass was recycled, 61.6 percent ended up in landfills and 13.4 percent was combusted.
Post-consumer paper and cardboard for 2018 totaled 67.4 million tons, or 23.1 percent of total MSW generation for the year. The material also had the highest recycling rate of any other material in MSW – 68.2 percent. 25.6 percent of paper ended up in landfills and 6.23 percent was combusted.
According to this EPA data, recyclable plastics, glass and paper accounted for 18.5 percent, 5.2 percent and 11.8 percent of MSW landfilled in 2018, respectively. Those three materials alone comprised 35.5 percent of the total landfilled trash in the U.S. for the year; had they been properly collected, processed and purchased, they theoretically could have been diverted and recycled.
The Reason: Recycling Is Bad Business Around the World
Recyclable waste must be sorted, cleaned and processed before it can be sold as a commodity on the open market. Nareeta Martin / Unsplash
Unfortunately, the EPA data also shows that 2018 was not an anomaly but rather another data point showing how the single-stream system in the U.S. has never been economically viable or feasible on a large scale. To further understand why recycling in America is failing, we need to think of recycled goods as commodities – because that's what they are.
According to the recycling center representative, municipalities and counties pay for residential and commercial recyclables to be trucked to local and regional recycling plants for processing. Clean batches are sorted and/or compressed into bales of similar plastics, paper, aluminum or glass. The centers sell the cleaned recyclables on the open market to buyers who will process them into recycled materials like plastic pellets or post-consumer paper; these can be turned into new products.
This entire process – the processing and creation of saleable recycled goods – costs money. As with any good, profitability requires selling for a higher price than it costs to make. Contaminated batches are harder to process into new products and therefore fetch a lower price on the market, if they can be sold at all. Currently, U.S. recyclables are no longer profitable, and no one wants to buy them.
China used to buy the majority of the world's plastics and paper for recycling, The New York Times reported. The U.S. has been the #1 generator of plastic waste in the world for years and used to ship more than half of its total plastic production to China, a November 2020 study found. The research also noted that up to one-fourth of American plastics sent abroad were contaminated or of poor quality, which would make it extremely difficult to recycle anyways.
Starting Jan. 1, 2018, China banned imports of most scrap materials because shipments were too contaminated, The Times reported; the country no longer wanted to be the "world's garbage dump."
As a result, the U.S. and other Western nations who had relied on China to offload their recyclables saw a "mounting crisis" of paper and plastic waste building up in ports and recycling facilities, The Times reported.
The Western nations began sending recyclable waste to other Southeast Asian countries like Vietnam, Indonesia, India and Malaysia. These countries often lacked the infrastructure to handle recyclables, so a lot of the waste ended up incinerated or landfilled
In response, in 2019, the United Nations passed an amendment to the Basel Convention hoping to protect the poor and developing countries who'd taken up China's vacated role in the global recycling trade. The amendment ambitiously aimed to clean up the global trade in plastic waste, making it more transparent and better regulated and allowing developing countries to reject contaminated shipments. The U.S. did not ratify the amendment, and new evidence suggests it continues to send illegal and/or contaminated shipments to developing countries.
Domestically, the closing of the Chinese market to U.S. recyclables bankrupted many domestic recycling programs because there was too much supply and no real demand. The smaller Asian countries could not accept nearly as much as China had. Prices of recyclables dropped, and bales of scrap materials were sent to landfills and incinerators when they couldn't be sold, another Times article reported.
This left waste-management companies around the country with no market for recyclabes, The Atlantic reported. They've been forced to go back to cities and municipalities with two choices: pay a lot more to get rid of their recycling or throw it away. The news report noted that most are choosing the latter.
"The economics are challenging," agreed Nilda Mesa, director of the Urban Sustainability and Equity Planning Program at the Earth Institute's Center for Sustainable Urban Development. "If there is not a market for the recycled material, then the numbers do not work for these facilities as well as cities, as they need to sell the materials to recoup their costs of collection and transportation, and even then it's typically only a portion of the costs," Columbia's State of the Planet reported.
Tiffany Duong is an avid ocean advocate. She holds degrees from UCLA and the University of Pennsylvania Carey Law School and is an Al Gore Climate Reality Leader and student member of The Explorer's Club.
She spent years as a renewable energy lawyer in L.A. before moving to the Amazon to conduct conservation fieldwork (and revamp her life). She eventually landed in the Florida Keys as a scientific scuba diver and field reporter and writes about the oceans, climate, and the environment from her slice of paradise. Follow her on Twitter/Instagram @lilicedt.
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One of the silver linings of the coronavirus pandemic was the record drop in greenhouse gas emissions following national lockdowns. But that drop is set to all but reverse as economies begin to recover, the International Energy Agency (IEA) warned Tuesday.
Overall energy demand is expected to rise 4.6 percent this year compared to 2020 and 0.5 percent compared to 2019, according to the IEA's Global Energy Review 2021. Demand for fossil fuels is expected to jump to such an extent that emissions will rise by nearly five percent in 2021. This will reverse 80 percent of the emissions decline reported in 2020, to end emissions just 1.2 percent below 2019 emissions levels. Because the lockdown saw the biggest drop in energy demand since World War II, the projected increase in carbon dioxide emissions will still be the second-highest on record, BBC News pointed out.
"This is a dire warning that the economic recovery from the COVID crisis is currently anything but sustainable for our climate," IEA Executive Director Fatih Birol said in a statement reported by AFP.
Birol said much of that increase was being driven by the resurgence of coal use. In fact, coal demand is expected to increase by 60 percent more than all forms of renewable energy, according to the report. Overall coal demand is expected to increase by 4.5 percent in 2021. More than 80 percent of that growth is in Asia, and more than 50 percent is in China. While coal use is expected to increase in the U.S. and Europe as well, it will remain far below pre-pandemic levels. Still, global coal use is expected to rise to nearly its 2014 peak, BBC News reported.
Natural gas demand is also expected to rise by 3.2 percent in 2021, to put it more than one percent above 2019 levels, according to the report.
There are, however, two bright spots in the report from a climate perspective. The first is that oil demand, while up 6.2 percent from 2020, is still expected to remain around 3 percent below 2019 levels. This is because oil use for ground transportation is not expected to recover until the end of 2021, and oil use for air travel is expected to remain at 20 percent below 2019 levels by December of 2021.
"A full return to pre-crisis oil demand levels would have pushed up CO2 emissions a further 1.5%, putting them well above 2019 levels," the report authors wrote.
The second bright spot is that renewable energy demand is set to rise in all sectors in 2021. In power, where its rise is the greatest, it is set to increase by more than eight percent. This is "the largest year-on-year growth on record in absolute terms," the report authors wrote.
Renewable energy will provide 30 percent of electricity overall, BBC News reported, which is the highest percentage since the industrial revolution. The problem is that the increase in renewables is running parallel to an increase in fossil fuels in some places. China, for example, is also expected to account for almost half of the rise in renewable electricity.
"As we have seen at the country-level in the past 15 years, the countries that succeed to cut their emissions are those where renewable energy replaces fossil energy," energy expert and University of East Anglia professor Corinne Le Quéré told BBC News. "What seems to be happening now is that we have a massive deployment of renewable energy, which is good for tackling climate change, but this is occurring alongside massive investments in coal and gas. Stimulus spending post-Covid-19 worldwide is still largely funding activities that lock us into high CO2 emissions for decades."
To address this issue, Birol called on the world leaders gathering for U.S. President Joe Biden's climate summit Thursday and Friday to pledge additional action before November's UN Climate Change Conference, according to AFP.
"Unless governments around the world move rapidly to start cutting emissions, we are likely to face an even worse situation in 2022," said Birol.
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The guide, 40-year-old Charles "Carl" Mock, was attacked Thursday while fishing alone in a forested area near West Yellowstone, Montana, The AP reported. He died in the hospital two days later. Wildlife officials killed the bear on Friday when it charged while they were investigating the attack.
"They yelled and made continuous noise as they walked toward the site to haze away any bears in the area," Montana Fish, Wildlife and Parks wrote in a press release. "Before they reached the site, a bear began charging the group. Despite multiple attempts by all seven people to haze away the bear, it continued its charge. Due to this immediate safety risk, the bear was shot and died about 20 yards from the group."
The AP reported the bear to be an older male that weighed at least 420 pounds. Wildlife workers later found a moose carcass about 50 yards from the site of the attack.
"This indicates the bear was defending a food source during the attack," Montana Fish, Wildlife and Parks wrote.
Mock was an experienced guide who worked for Backcountry Adventure, which provides snowmobile rentals and tours in Yellowstone National Park, according to The AP. His friend Scott Riley said Mock knew the risks of working around grizzly bears.
"He was the best guide around," Riley told The AP. "He had sight like an eagle and hearing like an owl... Carl was a great guy."
Mock carried bear spray, but investigators don't know if he had a chance to use it before the attack. Grizzly attacks are relatively rare in the Yellowstone area, CNN reported.
Since 1979, the park has welcomed more than 118 million visitors and recorded only 44 bear attacks. The odds of a grizzly attack in Yellowstone are about one in 2.7 million visits. The risk is lower in more developed areas and higher for those doing backcountry hikes.
Montana Fish, Wildlife and Parks advises being aware of surroundings, staying on trails, traveling in groups, making noise, avoiding animal remains, following food storage instructions and carrying bear spray and knowing how to use it. Above all, it's important to back away slowly if a bear encounter occurs.
It's also important to pay attention to the time of year.
"Now is the time to remember to be conscientious in the backcountry as the bears are coming out of hibernation and looking for food sources," the sheriff's office of Gallatin County, Montana, wrote in a statement about the attack.
Historically, people pose more of a threat to grizzly bears than the reverse.
"When Lewis and Clark explored the West in the early 1800s, grizzly bears roamed across vast stretches of open and unpopulated land between the Pacific Ocean and the Great Plains," the U.S Fish and Wildlife service wrote. "But when pioneers moved in, bears were persecuted and their numbers and range declined. As European settlement expanded over the next hundred years, towns and cities sprung up, and habitat for these large omnivores — along with their numbers — shrunk drastically. Of the many grizzly populations that were present in 1922, only six remained when they were listed by the Service in 1975 as a threatened species in the lower-48 states."
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By Brett Wilkins
In the latest of a flurry of proposed Green New Deal legislation, Reps. Cori Bush and Alexandria Ocasio-Cortez on Monday introduced the Green New Deal for Cities Act of 2021, a $1 trillion plan to "tackle the environmental injustices that are making us and our children sick, costing us our homes, and destroying our planet."
If approved, the bill would provide federal funding for state, local, tribal, and territorial governments to respond to the climate crisis, while creating hundreds of thousands of jobs in communities disproportionately affected by economic inequality.
"St. Louis and communities across the nation need the Green New Deal for Cities," Bush (D-Mo.) said in a statement introducing the bill. The St. Louis native added that Black children in her city "are 2.4 times more likely than white children to test positive for lead in their blood, and are 10 times more likely to visit the emergency room for asthma each year than white children."
"Black neighborhoods host the majority of the city's air pollution sources," Bush continued. "And there is a nuclear waste site—the West Lake Landfill, which is a catastrophe-in-progress."
"This legislation would make sure every city, town, county, and tribe can have a federally funded Green New Deal," she added. "This is a $1 trillion investment to tackle the environmental injustices that are making us and our children sick, costing us our homes, and destroying our planet."
We're introducing the Green New Deal for Cities. Here's what it means for you: ☀️ $1 trillion investment in our c… https://t.co/uJnnbM5NNx— Congresswoman Cori Bush (@Congresswoman Cori Bush)1618852007.0
Specifically, the GND4Cities would:
- Authorize $1 trillion, with a minimum of 50% of all investments going each to frontline communities and climate mitigation;
- Fund an expansive array of climate and environmental justice projects including wind power procurement, clean water infrastructure, and air quality monitoring;
- Support housing stability by conditioning funding to local governments to ensure they work with tenant and community groups to prevent displacement in communities receiving investment; and
- Support workers by including prevailing wage requirements, equitable and local hiring provisions, apprenticeship and workforce development requirements, project labor agreements, and "Buy America" provisions.
In an interview with St. Louis Public Radio, Bush explained that the Green New Deal for Cities is personal for her.
"I remember talking about lead paint as a child, hearing about it on the television and showing up at parks and people testing us for lead," she recalled. "It was like this thing when I was a kid, and it just went away."
Tune in to @STLonAir at noon to hear @RepCori discuss her and her colleagues' proposal for a Green New Deal for Cit… https://t.co/q3N0hmJndg— St. Louis Public Radio (@St. Louis Public Radio)1618845961.0
Bush said that "this whole thing is about saving lives," adding that "there are labor provisions in this bill to make sure that the workers are well-paid and well-treated for work."
"The urgency of this climate crisis and environmental racism demands that we equip our cities and our local governments with this funding," she added.
In her statement introducing the measure, Ocasio-Cortez (D-N.Y.) said that "the GND4Cities would provide local governments the funding to create good-paying, union jobs repairing their infrastructure, improving water quality, reducing air pollution, cleaning up parks, creating new green spaces, and eliminating blight."
"The desire for these investments is there," Ocasio-Cortez added. "We need to give our local communities the funding and support to act."
Although only Monday, it's already been a busy week for Ocasio-Cortez and the Green New Deal. Earlier in the day, she and Sen. Bernie Sanders (I-Vt.) reintroduced the Green New Deal for Public Housing, which they said would significantly improve living conditions and costs for nearly two million people who reside in public housing units, while creating more than 240,000 new jobs.
It’s Green New Deal week!👷🏽♂️🌎 This week we’re highlighting: ✅ Green New Deal reintro tomorrow w/ new Congression… https://t.co/3kEllAc40y— Alexandria Ocasio-Cortez (@Alexandria Ocasio-Cortez)1618878563.0
Later on Monday, Ocasio-Cortez and Sen. Ed Markey (D-Mass.) announced they will reintroduce their landmark 2019 Green New Deal bill on Tuesday. In a Spanish-language statement previewing the bill's introduction, Ocasio-Cortez said the measure "aims to create a national mobilization over the next 10 years that fights against economic, social, racial crises, as well as the interconnected climatic conditions affecting our country."
Reposted with permission from Common Dreams.
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Offshore oil and gas drillers have discarded and abandoned more than 18,000 miles of pipelines on the floor of the Gulf of Mexico since the 1960s, a report from the Government Accountability Office says.
The industry has essentially recovered none of the pipelines laid in the Gulf in the last six decades; the abandoned infrastructure accounts for more than 97% of all of the decommissioned pipelines in the Gulf.
The pipelines pose a threat to the habitat around them, as maritime commerce and hurricanes and erosion can move sections of pipeline.
The Bureau of Safety and Environmental Enforcement does not conduct undersea inspections even though surface monitoring is "not always reliable for detecting ruptures," according to the GAO.
For a deeper dive: