
After years of debate, the U.S. Environmental Protection Agency (EPA) is finally poised to revoke all uses of the pesticide chlorpyrifos, which first came online as a pest control technology in 1965.
That action, which could come this year, follows years of accumulating evidence that the organophosphate pesticide poses significant risks to people’s health and the environment. But Big Ag isn’t giving up on chlorpyrifos yet.
Marketed by Dow Agrosciences under the names Lorsban and Dursban, chlorpyrifos was once widely used to battle insects in homes, gardens and lawns as well as in agriculture. In June 2000, however, the company agreed to stop selling it for household uses because of the health risks it posed to children. But its agreement with the EPA did not extend to conventional agriculture, where chlorpyrifos is still widely used today.
Research has linked the pesticide to nervous system damage, behavioral problems and lower IQ in young children whose mothers were exposed during pregnancy. In adults, low-level exposure to chlorpyrifos can cause nausea, headaches and dizziness and farmworkers or others who experienced severe exposures have suffered vomiting, muscle cramps, diarrhea, blurred vision, loss of consciousness and even paralysis.
In its latest round of pesticide residue tests on fruits and veggies, the U.S. Department of Agriculture detected residues of chlorpyrifos on some samples of fruits and veggies children often eat, including peaches and nectarines.
The EPA’s final ruling to revoke all uses of chlorpyrifos in agriculture, which has been years in the making, still has Big Ag in a twist, which was on display last month at a hearing of the House Agriculture Committee’s subcommittee on Biotechnology, Horticulture and Research.
In his testimony, Richard Guebert, president of the Illinois Farm Bureau, bemoaned the pending decision to remove chlorpyrifos from the toolbox of conventional agribusiness, claiming that without it the cost of production and by extension the price of food, will go up.
“We are concerned that EPA has been reading too many inflammatory press releases from environmental groups and not enough science. Just in the past year, we have seen the agency take a number of actions that are troubling for growers,” Guebert said. “If the agency continues along this path, we are greatly concerned that it will eventually impose higher and higher costs on producers by depriving them of the crop protection tools they need.”
This ploy by chemical agriculture has popped up every time the EPA moved to restrict the use of a pesticide in order to protect public health and the environment. Years ago, the industry ran an ad, A World Without Lorsban, that predicted a barren world devoid of fresh fruits and vegetables if chlorpyrifos were banned.
So it comes as no surprise that Big Ag will fight to the bitter end to keep its grip on pesticides and other outdated and environmentally risky tools. Even in the face of overwhelming evidence that its practices contribute heavily to the problem of pesticide and fertilizer pollution of drinking water, conventional agribusiness regularly attacks both the research and those who dare to hold them accountable.
The fact of the matter is that dozens of synthetic pesticides that were once widely used on food have been banned or otherwise phased out and—lo and behold—you can still buy plenty of affordable fruits and vegetables in every corner of the country.
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A Game of Jenga
<p>Think of it as a game of Jenga and the planet's climate system as the tower. For generations, we have been slowly removing blocks. But at some point, we will remove a pivotal block, such as the collapse of one of the major global ocean circulation systems, for example the Atlantic Meridional Overturning Circulation (AMOC), that will cause all or part of the global climate system to fall into a planetary emergency.</p><p>But worse still, it could cause runaway damage: Where the tipping points form a domino-like cascade, where breaching one triggers breaches of others, creating an unstoppable shift to a radically and swiftly changing climate.</p><p>One of the most concerning tipping points is mass methane release. Methane can be found in deep freeze storage within permafrost and at the bottom of the deepest oceans in the form of methane hydrates. But rising sea and air temperatures are beginning to thaw these stores of methane.</p><p>This would release a powerful greenhouse gas into the atmosphere, 30-times more potent than carbon dioxide as a global warming agent. This would drastically increase temperatures and rush us towards the breach of other tipping points.</p><p>This could include the acceleration of ice thaw on all three of the globe's large, land-based ice sheets – Greenland, West Antarctica and the Wilkes Basin in East Antarctica. The potential collapse of the West Antarctic ice sheet is seen as a key tipping point, as its loss could eventually <a href="https://science.sciencemag.org/content/324/5929/901" target="_blank">raise global sea levels by 3.3 meters</a> with important regional variations.</p><p>More than that, we would be on the irreversible path to full land-ice melt, causing sea levels to rise by up to 30 meters, roughly at the rate of two meters per century, or maybe faster. Just look at the raised beaches around the world, at the last high stand of global sea level, at the end of the Pleistocene period around 120,0000 years ago, to see the evidence of such a warm world, which was just 2°C warmer than the present day.</p>Cutting Off Circulation
<p>As well as devastating low-lying and coastal areas around the world, melting polar ice could set off another tipping point: a disablement to the AMOC.</p><p>This circulation system drives a northward flow of warm, salty water on the upper layers of the ocean from the tropics to the northeast Atlantic region, and a southward flow of cold water deep in the ocean.</p><p>The ocean conveyor belt has a major effect on the climate, seasonal cycles and temperature in western and northern Europe. It means the region is warmer than other areas of similar latitude.</p><p>But melting ice from the Greenland ice sheet could threaten the AMOC system. It would dilute the salty sea water in the north Atlantic, making the water lighter and less able or unable to sink. This would slow the engine that drives this ocean circulation.</p><p><a href="https://www.carbonbrief.org/atlantic-conveyor-belt-has-slowed-15-per-cent-since-mid-twentieth-century" target="_blank">Recent research</a> suggests the AMOC has already weakened by around 15% since the middle of the 20th century. If this continues, it could have a major impact on the climate of the northern hemisphere, but particularly Europe. It may even lead to the <a href="https://ore.exeter.ac.uk/repository/handle/10871/39731?show=full" target="_blank" rel="noopener noreferrer">cessation of arable farming</a> in the UK, for instance.</p><p>It may also reduce rainfall over the Amazon basin, impact the monsoon systems in Asia and, by bringing warm waters into the Southern Ocean, further destabilize ice in Antarctica and accelerate global sea level rise.</p>The Atlantic Meridional Overturning Circulation has a major effect on the climate. Praetorius (2018)
Is it Time to Declare a Climate Emergency?
<p>At what stage, and at what rise in global temperatures, will these tipping points be reached? No one is entirely sure. It may take centuries, millennia or it could be imminent.</p><p>But as COVID-19 taught us, we need to prepare for the expected. We were aware of the risk of a pandemic. We also knew that we were not sufficiently prepared. But we didn't act in a meaningful manner. Thankfully, we have been able to fast-track the production of vaccines to combat COVID-19. But there is no vaccine for climate change once we have passed these tipping points.</p><p><a href="https://www.weforum.org/reports/the-global-risks-report-2021" target="_blank">We need to act now on our climate</a>. Act like these tipping points are imminent. And stop thinking of climate change as a slow-moving, long-term threat that enables us to kick the problem down the road and let future generations deal with it. We must take immediate action to reduce global warming and fulfill our commitments to the <a href="https://www.ipcc.ch/sr15/" target="_blank" rel="noopener noreferrer">Paris Agreement</a>, and build resilience with these tipping points in mind.</p><p>We need to plan now to mitigate greenhouse gas emissions, but we also need to plan for the impacts, such as the ability to feed everyone on the planet, develop plans to manage flood risk, as well as manage the social and geopolitical impacts of human migrations that will be a consequence of fight or flight decisions.</p><p>Breaching these tipping points would be cataclysmic and potentially far more devastating than COVID-19. Some may not enjoy hearing these messages, or consider them to be in the realm of science fiction. But if it injects a sense of urgency to make us respond to climate change like we have done to the pandemic, then we must talk more about what has happened before and will happen again.</p><p>Otherwise we will continue playing Jenga with our planet. And ultimately, there will only be one loser – us.</p>By John R. Platt
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