Washington — Former President Barack Obama slammed the Trump administration's repeal of a landmark climate finding from the Democrat's presidency, saying the United States is "less safe" after President Donald Trump eliminated the legal basis for federal regulations targeting greenhouse gases.

The 2009 endangerment finding affirms that carbon dioxide and other greenhouse gases pose a threat to human health and welfare. Its repeal marks one of the most significant deregulatory actions in U.S.

The Trump administration revoked the EPA’s 2009 endangerment finding, which has served as the legal foundation for regulating greenhouse gas emissions under the Clean Air Act.

Trump terminates Obama-era findings that tied greenhouse gases to climate change - The move eviscerates the government’s ability to regulate carbon dioxide and other greenhouse gases

According to the report, winters in 13 cities have shrunk by three weeks or more. Science is clear that climate change is driven by human activity.

A warming Arctic can stretch the polar vortex, a high-altitude air ribbon, one says. The “wobble” can disrupt the jet stream, causing extreme cold in the East.