“Rigorous scientific findings since 2009 have showed that greenhouse gases and global warming are harming public health.”

Trump Repeals Key Greenhouse Gas Finding, Erasing EPA’s Power to Fight Climate Change

“Scientists are unequivocal: The dangers of unchecked greenhouse gas emissions were clear in 2009, and they have only grown more evident since.”

What to Know About the E.P.A.’s Big Attack on Climate Regulation

“In 2009, President Barack Obama’s Environmental Protection Agency declared exactly this — what scientists had been saying for decades — that carbon dioxide and other greenhouse gases harm the health of Americans.”

The U.S. Government Now Says Climate Change Doesn’t Harm Human Health

“In 2009, the endangerment rule found that greenhouse gases, such as carbon dioxide and methane, endanger human life.”

President Obama reacts to Trump rolling back environmental rule he established in 2009: ‘We’ll be less safe’

“The endangerment finding was a 2009 scientific conclusion that greenhouse gas emissions pose a danger to Americans’ health and welfare.”

With Latest Rollback, the U.S. Essentially Has No Clean-Car Rules