A coalition of community and environmental organizations filed a federal lawsuit against the U.S. Environmental Protection Agency (EPA) Wednesday calling for regulations to stop oil and gas companies from disposing and handling drilling and fracking wastes in ways that threaten public health and the environment.
“Waste from the oil and gas industry is very often toxic and should be treated that way,” Amy Mall, senior policy analyst at the Natural Resources Defense Council, said. “Right now, companies can get rid of their toxic mess in any number of dangerous ways—from spraying it on icy roads, to sending it to landfills with our everyday household trash, to injecting it underground where it can endanger drinking water and trigger earthquakes. EPA must step in and protect our communities and drinking water from the carcinogens, radioactive material and other dangerous substances that go hand-in-hand with oil and gas waste.”
The organizations are pushing the EPA to issue rules that address problems including the disposal of fracking wastewater in underground injection wells, which accept hundreds of millions of gallons of oil and gas wastewater and have been linked to numerous earthquakes in Arkansas, Colorado, Kansas, New Mexico, Ohio, Oklahoma and Texas.
“Updated rules for oil and gas wastes are almost 30 years overdue and we need them now more than ever,” Adam Kron, senior attorney at the Environmental Integrity Project, said. “Each well now generates millions of gallons of wastewater and hundreds of tons of solid wastes and yet EPA’s inaction has kept the most basic, inadequate rules in place. The public deserves better than this.”
The groups filing suit include the Environmental Integrity Project, Natural Resources Defense Council, Earthworks, Responsible Drilling Alliance, San Juan Citizens Alliance, West Virginia Surface Owners’ Rights Organization, and the Center for Health, Environment and Justice.
The lawsuit, filed in the U.S. District Court for the District of Columbia, calls on the court to set strict deadlines for the EPA to comply with its long-overdue obligations to update waste disposal rules that should have been revised more than a quarter century ago.
The organizations are urging the EPA to ban the practice of spreading fracking wastewater onto roads or fields, which allows toxic pollutants to run off and contaminate streams. And the EPA should require landfills and ponds that receive drilling and fracking waste to be built with adequate liners and structural integrity to prevent spills and leaks into groundwater and streams.
The groups filed a notice of their intent to sue the EPA last August, warning the agency a lawsuit would follow unless it complied with its duty under the Resource Conservation and Recovery Act (RCRA) to review and revise the federal regulations and guidelines governing how oil and gas waste must be handled and disposed. RCRA requires that the EPA review the regulations and state plan guidelines at least every three years and, if necessary, revise them. The agency determined in 1988 that such revisions of the regulations were necessary to address specific concerns with oil and gas wastes, yet has failed to meet its legal responsibility to act for nearly three decades.
“Waste from the oil & gas industry is very often toxic and should be treated that way,” says @NRDC senior policy analyst Amy Mall.— NRDC (@NRDC)1462379531.0
Background
Over the last decade, the oil and gas industry’s fracking-based boom has produced a vast amount of solid and liquid waste. Each well produces millions of gallons of wastewater and hundreds of tons of drill cuttings, which contain contaminants that pose serious risks to human health. These include known carcinogens such as benzene, toxic metals such as mercury and radioactive materials. However, the current RCRA rules that govern oil and gas wastes are too weak because they are the same rules that apply to all “non-hazardous” wastes, including household trash.
As a result, oil and gas companies are disposing, storing, transporting and handling these wastes in a number of troublesome ways. These include: spraying fracking waste fluids onto roads and land near where people live and work; disposing of billions of gallons of oil and gas wastewater in underground injection wells; sending the drill cuttings and fracking sands to landfills not designed to handle toxic or radioactive materials; and storing and disposing of wastewater in pits and ponds, which often leak. Across the U.S., there are numerous instances of wastes leaking out of ponds and pits into nearby streams and the groundwater beneath and operators often “close” the pits by simply burying the wastes on site.“
In 1988, the EPA promised to require oil and gas companies to handle this waste more carefully,” said Aaron Mintzes, Policy Advocate for Earthworks. “Yet neither EPA nor the states have acted. Today's suit just says 28 years is too long for communities to wait for protections from this industry's hazardous waste.”
- Ohio: Underground injection wells in Ohio accepted 1.2 billion gallons of oil and gas wastewater for disposal in 2015, more than double the amount in 2011. Half this wastewater came from out of state. This has resulted in scores of earthquakes in the well-dense Youngstown area, with one well alone linked to 77 earthquakes. The Ohio Oil and Gas Commission recently noted that regulations “have not kept pace” with the problem and that (to an extent) both the state and industry are “working with their eyes closed.” Other states that have experienced increased seismic events in the proximity of injection wells include Arkansas, Colorado, Kansas, New Mexico, Oklahoma and Texas.
- Pennsylvania: In May 2012, a six-million-gallon industrial pond holding fracking wastewater in Tioga County leaked pollutants, including arsenic and strontium, through holes in its liner into groundwater and a nearby trout stream.
- West Virginia: Oil and gas wastewater dumped or spilled in rivers in West Virginia and Pennsylvania contains high levels of potentially hazardous ammonium and iodide, according to a study by Duke University scientists.
- North Dakota: In January 2015, three million gallons of drilling wastewater spilled from a leaky pipe outside Williston, polluting a tributary of the Missouri River. In July 2011, a pipeline serving a well in Bottineau County leaked over two million gallons of fracking wastewater, damaging 24 acres of private land.
- Colorado: A contractor for a pipeline services firm gave a detailed account of sand-blasting pulverized waste buildup (called “scale”) from pipeline seals directly into the air outdoors without a filter, even though such dust can be radioactive and cause damage to lungs.
- Across the Marcellus region: Over the past several years, landfills in states around the Marcellus shale formation—even in New York, where fracking is prohibited—have experienced increasing shipments of drill cuttings that contain high levels of radiation. Many of the landfills do not test for radiation and do not have adequate controls to prevent the often toxic and radioactive “leachate” from seeping into groundwater.
“Although West Virginia has taken some steps to improve regulation, the state's approach has been to permit horizontal drilling without carefully considering whether current methods of waste disposal are appropriate or adequate,” Julie Archer, project manager at the West Virginia Surface Owners Rights Organization, said. “It's past time for the EPA to provide clear guidance on how these wastes should be handled to protect our communities."
EPA’s current regulations do not take into account the dangerous contents of oil and gas wastes or their unique handling and disposal practices. Since 1988, the agency has acknowledged the shortcoming of its basic rules for solid waste management and has indicated that it needs to create enhanced rules tailored to the oil and gas industry. However, the agency has yet to take any action to develop these updated regulations.
“A major reason for the industry’s use of injection wells to dispose of toxic fracking waste is the low disposal cost,” Teresa Mills, director of the Ohio field office for the Center for Health, Environment and Justice, said. “We reject this reasoning because the public’s health and safety must come first.”
“As an organization representing hundreds of families living in close proximity to oil and gas operations, we see not only the physical pollution, but also the psychological toll that oil and gas waste exacts on communities,” Dan Olson, executive director of the Colorado-based San Juan Citizens Alliance, said. “That the EPA is 30 years overdue in creating common sense rules for managing toxic waste from oil and gas operations is a cause of great concern for everyone living near these sources of improperly regulated industrial pollution.”
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Consumers may be happy, but climate change is making coffee farmers bitter. Diseases and pests are becoming more common and severe as temperatures rise. The fungal infection known as coffee leaf rust has devastated plantations in Central and South America. And while robusta crops tend to be more resistant, they need plenty of rain – a tall order as droughts proliferate.
The future for coffee farming looks difficult, if not bleak. But one of the more promising solutions involves developing new, more resilient coffee crops. Not only will these new coffees have to tolerate higher temperatures and less predictable rainfall, they'll also have to continue satisfying consumer expectations for taste and smell.
Finding this perfect combination of traits in a new species seemed remote. But in newly published research, my colleagues and I have revealed a little-known wild coffee species that could be the best candidate yet.
Coffee Farming in a Warming World
Coffea stenophylla was first described as a new species from Sierra Leone in 1834. It was farmed across the wetter parts of upper west Africa until the early 20th century, when it was replaced by the newly discovered and more productive robusta, and largely forgotten by the coffee industry. It continued to grow wild in the humid forests of Guinea, Sierra Leone and Ivory Coast, where it became threatened by deforestation.
At the end of 2018, we found stenophylla in Sierra Leone after searching for several years, but failed to find any trees in fruit until mid-2020, when a 10g sample was recovered for tasting.
Field botanists of the 19th century had long proclaimed the superior taste of stenophylla coffee, and also recorded its resistance to coffee leaf rust and drought. Those early tasters were often inexperienced though, and our expectations were low before the first tasting in the summer of 2020. That all changed once I'd sampled the first cup on a panel with five other coffee experts. Those first sips were revelatory: it was like expecting vinegar and getting champagne.
This initial tasting in London was followed by a thorough evaluation of the coffee's flavour in southern France, led by my research colleague Delpine Mieulet. Mieulet assembled 18 coffee connoisseurs for a blind taste test and they reported a complex profile for stenophylla coffee, with natural sweetness, medium-high acidity, fruitiness, and good body, as one would expect from high-quality arabica.
C. stenophylla growing in the wild, Ivory Coast. E. Couturon / IRD, Author provided
In fact, the coffee seemed very similar to arabica. At the London tasting, the Sierra Leone sample was compared to arabica from Rwanda. In the blind French tasting, most of the judges (81%) said stenophylla tasted like arabica, compared to 98% and 44% for the two arabica control samples, and 7% for a robusta sample.
The coffee tasting experts picked up on notes of peach, blackcurrant, mandarin, honey, light black tea, jasmine, chocolate, caramel and elderflower syrup. In essence, stenophylla coffee is delicious. And despite scoring highly for its similarity to arabica, the stenophylla coffee sample was identified as something entirely unique by 47% of the judges. That means there may be a new market niche for this rediscovered coffee to fill.
The taste testers approved of stenophylla's sweet and fruity flavour. CIRAD, Author provided
Breaking New Grounds
Until now, no other wild coffee species has come close to arabica for its superior taste. Scientifically, the results are compelling because we would simply not expect stenophylla to taste like arabica. These two species are not closely related, they originated on opposite sides of the African continent and the climates in which they grow are very different. They also look nothing alike: stenophylla has black fruit and more complex flowers while arabica cherries are red.
It was always assumed that high-quality coffee was the preserve of arabica – originally from the forests of Ethiopia and South Sudan – and particularly when grown at elevations above 1,500 metres, where the climate is cooler and the light is better.
Stenophylla coffee breaks these rules. Endemic to Guinea, Sierra Leone and Ivory Coast, stenophylla grows in hot conditions at low elevations. Specifically it grows at a mean annual temperature of 24.9°C – 1.9°C higher than robusta, and up to 6.8°C higher than arabica. Stenophylla also appears more tolerant of droughts, potentially capable of growing with less rainfall than arabica.
Robusta coffee can grow in similar conditions to stenophylla, but the price paid to farmers is roughly half that of arabica. Stenophylla coffee makes it possible to grow a superior tasting coffee in much warmer climates. And while stenophylla trees tend to produce less fruit than arabica, they still yield enough to be commercially viable.
The stenophylla harvest on Reunion Island. IRD / CIRAD, Author provided
To breed the coffee crop plants of the future, we need species with great flavour and high heat tolerance. Crossbreeding stenophylla with arabica or robusta could make both more resilient to climate change, and even improve their taste, particularly in the latter.
With stenophylla's rediscovery, the future of coffee just got a little brighter.
Aaron P Davis: Senior Research Leader, Plant Resources, Royal Botanic Gardens, Kew
Disclosure statement: Aaron P Davis receives funding from Darwin Initiative (UK).
Reposted with permission from The Conversation.
These longer periods of stratification could have "far-reaching implications" for lake ecosystems, the paper says, and can drive toxic algal blooms, fish die-offs and increased methane emissions.
The study, published in Nature Communications, finds that the average seasonal lake stratification period in the northern hemisphere could last almost two weeks longer by the end of the century, even under a low emission scenario. It finds that stratification could last over a month longer if emissions are extremely high.
If stratification periods continue to lengthen, "we can expect catastrophic changes to some lake ecosystems, which may have irreversible impacts on ecological communities," the lead author of the study tells Carbon Brief.
The study also finds that larger lakes will see more notable changes. For example, the North American Great Lakes, which house "irreplaceable biodiversity" and represent some of the world's largest freshwater ecosystems, are already experiencing "rapid changes" in their stratification periods, according to the study.
'Fatal Consequences'
As temperatures rise in the spring, many lakes begin the process of "stratification." Warm air heats the surface of the lake, heating the top layer of water, which separates out from the cooler layers of water beneath.
The stratified layers do not mix easily and the greater the temperature difference between the layers, the less mixing there is. Lakes generally stratify between spring and autumn, when hot weather maintains the temperature gradient between warm surface water and colder water deeper down.
Dr Richard Woolway from the European Space Agency is the lead author of the paper, which finds that climate change is driving stratification to begin earlier and end later. He tells Carbon Brief that the impacts of stratification are "widespread and extensive," and that longer periods of stratification could have "irreversible impacts" on ecosystems.
For example, Dr Dominic Vachon – a postdoctoral fellow from the Climate Impacts Research Centre at Umea University, who was not involved in the study – explains that stratification can create a "physical barrier" that makes it harder for dissolved gases and particles to move between the layers of water.
This can prevent the oxygen from the surface of the water from sinking deeper into the lake and can lead to "deoxygenation" in the depths of the water, where oxygen levels are lower and respiration becomes more difficult.
Oxygen depletion can have "fatal consequences for living organisms," according to Dr Bertram Boehrer, a researcher at the Helmholtz Centre for Environmental Research, who was not involved in the study.
Lead author Woolway tells Carbon Brief that the decrease in oxygen levels at deeper depths traps fish in the warmer surface waters:
"Fish often migrate to deeper waters during the summer to escape warmer conditions at the surface – for example during a lake heatwave. A decrease in oxygen at depth will mean that fish will have no thermal refuge, as they often can't survive when oxygen concentrations are too low."
This can be very harmful for lake life and can even increase "fish die-off events" the study notes.
However, the impacts of stratification are not limited to fish. The study notes that a shift to earlier stratification in spring can also encourage communities of phytoplankton – a type of algae – to grow sooner, and can put them out of sync with the species that rely on them for food. This is called a "trophic mismatch."
Prof Catherine O'Reilly, a professor of geography, geology and the environment at Illinois State University, who was not involved in the study, adds that longer stratified periods could also "increase the likelihood of harmful algae blooms."
The impact of climate change on lakes also extends beyond ecosystems. Low oxygen levels in lakes can enhance the production of methane, which is "produced in and emitted from lakes at globally significant rates," according to the study.
Woolway explains that higher levels of warming could therefore create a positive climate feedback in lakes, where rising temperatures mean larger planet-warming emissions:
"Low oxygen levels at depth also promotes methane production in lake sediments, which can then be released to the surface either via bubbles or by diffusion, resulting in a positive feedback to climate change."
Onset and Breakup
In the study, the authors determine historical changes in lake stratification periods using long-term observational data from some of the "best-monitored lakes in the world" and daily simulations from a collection of lake models.
They also run simulations of future changes in lake stratification period under three different emission scenarios, to determine how the process could change in the future. The study focuses on lakes in the northern hemisphere.
The figure below shows the average change in lake stratification days between 1900 and 2099, compared to the 1970-1999 average. The plot shows historical measurements (black), and the low emission RCP2.6 (blue), mid emissions RCP6.0 (yellow) and extremely high emissions RCP8.5 (red) scenarios.
Change in lake stratification duration compared to the 1970-1999 average, for historical measurements (black), the low emission RCP2.6 (blue) moderate emissions RCP6.0 (yellow) and extremely high emissions RCP8.5 (red). Credit: Woolway et al (2021).
The plot shows that the average lake stratification period has already lengthened. However, the study adds that some lakes are seeing more significant impacts than others.
For example, Blelham Tarn – the most well-monitored lake in the English Lake District – is now stratifying 24 days earlier and maintaining its stratification for an extra 18 days compared to its 1963-1972 averages, the study finds. Woolway tells Carbon Brief that as a result, the lake is already showing signs of oxygen depletion.
Climate change is increasing average stratification duration in lakes, the findings show, by moving the onset of stratification earlier and pushing the stratification "breakup" later. The table below shows projected changes in the onset, breakup and overall length of lake stratification under different emission scenarios, compared to a 1970-1999 baseline.
The table shows that even under the low emission scenario, the lake stratification period is expected to be 13 days longer by the end of the century. However, in the extremely high emissions scenario, it could be 33 days longer.
The table also shows that stratification onset has changed more significantly than stratification breakup. The reasons why are revealed by looking at the drivers of stratification more closely.
Warmer Weather and Weaker Winds
The timing of stratification onset and breakup in lakes is driven by two main factors – temperature and wind speed.
The impact of temperature on lake stratification is based on the fact that warm water is less dense than cool water, Woolway tells Carbon Brief:
"Warming of the water's surface by increasing air temperature causes the density of water to decrease and likewise results in distinct thermal layers within a lake to form – cooler, denser water settles to the bottom of the lake, while warmer, lighter water forms a layer on top."
This means that, as climate change causes temperatures to rise, lakes will begin to stratify earlier and remain stratified for longer. Lakes in higher altitudes are also likely to see greater changes in stratification, Woolway tells Carbon Brief, because "the prolonging of summer is very apparent in high latitude regions."
The figure below shows the expected increase in stratification duration from lakes in the northern hemisphere under the low (left), mid (center), and high (right) emission scenarios. Deeper colors indicate a larger increase in stratification period.
Expected increase in stratification duration in lakes in the northern hemisphere under the low (left), mid (centre) and high (right) emissions scenarios. Credit: Woolway et al (2021).
The figure shows that the expected impact of climate change on stratification duration becomes more pronounced at more northerly high latitudes.
The second factor is wind speed, Woolway explains:
"Wind speed also affects the timing of stratification onset and breakdown, with stronger winds acting to mix the water column, thus acting against the stratifying effect of increasing air temperature."
According to the study, wind speed is expected to decrease slightly as the planet warms. The authors note that the expected changes in near-surface wind speed are "relatively minor" compared to the likely temperature increase, but they add that it may still cause "substantial" changes in stratification.
The study finds that air temperature is the most important factor behind when a lake will begin to stratify. However, when looking at stratification breakup, it finds that wind speed is a more important driver.
Meanwhile, Vachon says that wind speeds also have implications for methane emissions from lakes. He notes that stratification prevents the methane produced on the bottom of the lake from rising and that, when the stratification period ends, methane is allowed to rise to the surface. However, according to Vachon, the speed of stratification breakup will affect how much methane is released into the atmosphere:
"My work has suggested that the amount of accumulated methane in bottom waters that will be finally emitted is related to how quickly the stratification break-up occurs. For example, a slow and progressive stratification break-up will most likely allow water oxygenation and allow the bacteria to oxidise methane into carbon dioxide. However, a stratification break-up that occurs rapidly – for example after storm events with high wind speed – will allow the accumulated methane to be emitted to the atmosphere more efficiently."
Finally, the study finds that large lakes take longer to stratify in spring and typically remain stratified for longer in the autumn – due to their higher volume of water. For example, the authors highlight the North American Great Lakes, which house "irreplaceable biodiversity" and represent some of the world's largest freshwater ecosystems.
These lakes have been stratifying 3.5 days earlier every decade since 1980, the authors find, and their stratification onset can vary by up to 48 days between some extreme years.
O'Reilly tells Carbon Brief that "it's clear that these changes will be moving lakes into uncharted territory" and adds that the paper "provides a framework for thinking about how much lakes will change under future climate scenarios."
Reposted with permission from Carbon Brief.