What does revocation of the ‘danger finding’ mean for public health?
The EPA has rescinded a rule that said climate change harms human health. This could mean
The Trump administration’s decision Thursday to rescind the “endangerment finding” will have wide-ranging consequences on greenhouse gas emissions and, ultimately, could accelerate climate change, increase risks to human health and increase fuel costs.
But what is a “threat finding”, and what does the revocation of this 2009 finding mean for you? Let’s break down the facts.
What is the danger point?
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To understand the implications of the threat, we need to turn back the clock to the Clean Air Act, the landmark law of 1970 that allows the Environmental Protection Agency to regulate air pollutants.
The act was originally used to target pollutants like sulfur oxides and particulate matter, but it was intentionally written broadly so that Congress wouldn’t have to rethink it whenever a new pollutant emerged, said Camille Pannu, associate clinical professor of law at Columba Law School. scientific American Last year.
In 1999 a group of environmental organizations, and eventually states, began petitioning the EPA to regulate greenhouse gases under the Clean Air Act. Finally in 2007 the Supreme Court gave its verdict in this case Massachusetts v. EPA Greenhouse gases, including carbon dioxide, qualify as “air pollutants” under the Clean Air Act. The EPA needed to determine whether emissions from cars and trucks would endanger public health or whether the science was too uncertain.
Flash forward to 2009: then-EPA Administrator Lisa P. Jackson issued a “threat finding”, which identified six greenhouse gases and deemed that they actually “threaten the public health and welfare of present and future generations.” This rule became the cornerstone on which all subsequent EPA regulations on greenhouse gases are based. As long as it was in place, the EPA could not legally ignore climate change or cut greenhouse gas regulations altogether.
What is the effect of revoking the threat finding?
In the short term, EPA regulations on greenhouse gas emissions and fuel efficiency standards for new cars and trucks will be repealed and not replaced. However, the decision to repeal the rule will face lengthy legal challenges.
The EPA has also proposed repealing rules on industrial emissions and delaying rules designed to reduce methane emissions, one of the most powerful greenhouse gases, from oil and gas facilities.
Revocation of the endangerment finding would make it harder for future administrations to regulate carbon dioxide and other greenhouse gases under the Clean Air Act without new legislation or amendments passed by Congress.
How does climate change affect public health?
There is a strong body of evidence showing the harms of climate change on health. One of the most direct risks is heat waves, which have become more intense, more frequent and longer lasting due to increases in global background temperatures. Children, pregnant people, older people, and people who work outside are especially vulnerable to heat illness, which can lead to problems ranging from dehydration to death.
Climate change has also been linked to worsening seasonal allergies and higher risk of premature birth. Additionally, it increases smog and other air pollution which is linked to asthma, heart disease and adverse pregnancy outcomes. Excessive rainfall caused by a warming climate also increases the risk of drinking water becoming contaminated with toxic bacteria such as Salmonella And Campylobacter. And as temperatures warm and precipitation patterns change, insects that carry diseases — like mosquitoes that spread malaria and ticks that spread West Nile virus and Lyme disease — are expanding their range.
Climate change also adversely impacts mental health, leading to mental trauma as well as physical injury from climate-induced weather extremes such as hurricanes, floods and wildfires. And research has shown that the effects of events like hurricanes can cause death long after the storm.
Has Danger Discovery been in danger before?
In President Donald Trump’s first term in office, then-EPA Administrator Scott Pruitt sought to replace Obama-era emissions rules with weaker ones that were backed by fossil fuel companies, the industrial sector and car companies. This strategy would have allowed the threat to be detected, while avoiding potential legal challenges.
When President Joe Biden took office in 2021, his EPA replaced those weaker rules with more stringent ones. At the end of his presidency in 2024, Biden announced his pledge to reduce US emissions by 66 percent by 2035. Overturning Biden’s updated laws has become a centerpiece of Trump’s second term.
How does this fit with the rest of Trump’s climate policy?
Trump has long called climate change a “hoax” despite decades of rigorous research and evidence in support of global warming. He began his second presidency by once again withdrawing the US from the Paris climate agreement to limit temperature rise to below 1.5 degrees Celsius. In 2026, Trump also withdrew the US from the United Nations Framework Convention on Climate Change, the treaty under which the Paris Agreement was negotiated.
The current Trump administration has also tried to curb the construction of renewable energy in the US, particularly offshore wind turbines, which the president has falsely linked to whale deaths. And the administration has sought to boost fossil fuels by opening more federal lands to drilling and ordering coal plants marked for retirement to remain open.
Editor’s note (2/12/26): This article was edited after posting to correct details Massachusetts v. EPA and threat detection.
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