Evidence that climate change harms public health is “beyond scientific dispute,” the independent National Academy of Sciences said Wednesday in response to the Trump administration’s efforts to revoke a landmark U.S. government finding to that effect that underpins key environmental regulations.

The NAS, a non-governmental nonprofit set up to advise the government on science, said human activity is releasing greenhouse gases that are warming the planet, increasing extreme temperatures and changing the oceans, all dangerous developments for the health and welfare of the United States public. Evidence to that effect has only grown stronger since 2009, the group said.

In July, the Trump administration proposed revoking what’s known as the 2009 “endangerment” finding, the concept that climate change is a threat. Overturning it could pave the way for cutting a range of rules that limit pollution from cars, power plants and other sources.