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C02 and Food: We Can't Sacrifice Quality for Quantity
Bigger isn't always better. Too much of a good thing can be bad. Many anti-environmentalists throw these simple truths to the wind, along with caution.
You can see it in the deceitful realm of climate change denial. It's difficult to keep up with the constantly shifting—and debunked—denier arguments, but one common thread promoted by the likes of the Heartland Institute in the U.S. and its Canadian affiliate, the misnamed International Climate Science Coalition, illustrates the point. They claim carbon dioxide is good for plants, and plants are good for people, so we should aim to pump even more CO2 into the atmosphere than we already are.
We've examined the logical failings of this argument before—noting that studies have found not all plants benefit from increased CO2 and that most plants don't fare well under climate change—exacerbated drought or flooding, among other facts. Emerging research should put the false notion to rest for good.
Several studies have found that, even when increased CO2 makes plants grow bigger and faster, it reduces proteins and other nutrients and increases carbohydrates in about 95 percent of plant species, including important food crops such as barley, rice, wheat and potatoes. A 2014 Harvard School of Public Health study, published in Nature, found that increased CO2 reduced the amount of valuable minerals such as zinc and iron in all of them.
Another study, by Irakli Loladze at the Catholic University of Daegu in South Korea, looked at 130 species of food plants and found increased CO2 caused calcium, magnesium, potassium, zinc and iron concentrations in plants to decline by an average of eight percent, while sugar and starch content increased.
As a Scientific American article pointed out, billions of people depend on crops like wheat and rice for iron and zinc. Zinc deficiency is linked to hundreds of thousands of deaths, mostly children, and exacerbates health issues such as pneumonia and malaria. Iron deficiency, which causes anemia, is responsible for one-fifth of maternal deaths worldwide.
Part of the problem with the industrial agricultural mindset and the denier argument that CO2 is plant food or "aerial fertilizer" is the idea that bigger and faster are better. These studies illustrate the problem with the climate change denial argument but, in its pursuit of profit, industrial agriculture has often made the same mistake. Plants—and now even animals like salmon—have mainly been bred, through conventional breeding and genetic engineering, to grow faster and bigger, with little regard for nutrient value (leaving aside anomalies like the not-entirely-successful "golden rice"). But higher yields have often resulted in less nutritious fruits and vegetables.
Genetic engineering's promise was increased yields and reduced need for pesticides, but studies show it has fallen far short of that ambition. A 2016 National Academy of Sciences study, as well as a New York Times investigation, found no evidence that genetically engineered crops increased yields over conventional crops. Although insecticide and fungicide use on GE crops in the U.S. and Canada has decreased, herbicide use has gone up to the point that overall pesticide use has increased. France, which doesn't rely on genetically modified crops, has reduced use of all pesticides—65 percent for insecticides and fungicides and 36 percent for herbicides—without any decrease in yields.
The "golden rice" experiment shows that plants can be engineered for higher nutrient value, but that hasn't been the priority for large agrochemical companies.
As for carbon dioxide, we know that fossil fuel use, industrial agriculture, cement production and destruction of carbon sinks like wetlands and forests are driving recent global warming, to the detriment of humanity. The one flimsy argument climate change deniers have been holding onto—that it will make plants grow faster and bigger—has proven to be a poor one.
Like life itself, science is complex. Reductive strategies that look at phenomena and reactions in isolation miss the big picture. Our species faces an existential crisis. Overcoming it will require greater wisdom and knowledge and a better understanding of nature's interconnectedness. Tackling climate disruption and feeding humanity are connected. It's past time to ignore the deniers, reassess our priorities and take the necessary measures to slow global warming.
David Suzuki is a scientist, broadcaster, author and co-founder of the David Suzuki Foundation. Written with contributions from David Suzuki Foundation Senior Editor Ian Hanington.
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‘Companies Should Not Be Allowed to Use Hazardous Ingredients in Products People Use’: Michelle Pfeiffer Speaks Up for Safer Cosmetics
The beauty products we put on our skin can have important consequences for our health. Just this March, the U.S. Food and Drug Administration (FDA) warned that some Claire's cosmetics had tested positive for asbestos. But the FDA could only issue a warning, not a recall, because current law does not empower the agency to do so.
Michelle Pfeiffer wants to change that.
The actress and Environmental Working Group (EWG) board member was spotted on Capitol Hill Thursday lobbying lawmakers on behalf of a bill that would increase oversight of the cosmetics industry, The Washington Post reported.
By Julia Conley
Scientists at the United Nations' intergovernmental body focusing on biodiversity sounded alarms earlier this month with its report on the looming potential extinction of one million species — but few heard their calls, according to a German newspaper report.
The climate crisis is a major concern for American voters with nearly 40 percent reporting the issue will help determine how they cast their ballots in the upcoming 2020 presidential election, according to a report compiled by the Yale Program on Climate Change Communication.
Of more than 1,000 registered voters surveyed on global warming, climate and energy policies, as well as personal and collective action, 38 percent said that a candidate's position on climate change is "very important" when it comes to determining who will win their vote. Overall, democratic candidates are under more pressure to provide green solutions as part of their campaign promises with 64 percent of Democrat voters saying they prioritize the issue compared with just 34 percent of Independents and 12 percent of Republicans.
President Donald Trump has agreed to sign a $19.1 billion disaster relief bill that will help Americans still recovering from the flooding, hurricanes and wildfires that have devastated parts of the country in the past two years. Senate Republicans said they struck a deal with the president to approve the measure, despite the fact that it did not include the funding he wanted for the U.S.-Mexican border, CNN reported.
"The U.S. Senate has just approved a 19 Billion Dollar Disaster Relief Bill, with my total approval. Great!" the president tweeted Thursday.
"There was a lot of devastation throughout the state," Governor Mike Parson said at a Thursday morning press conference, as NPR reported. "We were very fortunate last night that we didn't have more injuries than what we had, and we didn't have more fatalities across the state. But three is too many."