The Trump administration has taken significant steps to roll back US climate change standards by revoking the endangerment finding which classified carbon dioxide and other greenhouse gases as threats to public health. This move represents the administration's largest attack on environmental regulations to date, disrupting foundational policies established under the Obama administration that facilitated the regulation of greenhouse gas emissions under the Clean Air Act.

The endangerment finding, established in 2009, has been pivotal for the regulation of emissions from various sources including vehicles and power plants. Its annulment by the Environmental Protection Agency signals a considerable shift in US environmental policy, aiming to ease restrictions on greenhouse gas emissions and potentially escalating the impacts of climate change on public health and welfare across the nation.

Experts warn that this rollback could hinder the US's ability to combat climate change effectively, possibly leading to increased greenhouse gas emissions and deteriorating air quality. This decision also reflects the broader ideological divide in US politics regarding environmental management and climate action, raising concerns among environmental advocates about the long-term implications for both policy and public health under the current administration's agenda.