Earth, Wind and Fire: What is the endangerment finding?

Last week, the Environmental Protection Agency announced its intent to challenge a Obama-era EPA finding known as the "endangerment finding."

So, what is the 2007 finding?

While not a regulation in itself, the finding paved the way for setting greenhouse gas emissions standards.

It took a 10-year journey to get there. In 1999, conservation and renewable energy groups — including the New Mexico Solar Energy Association — petitioned the EPA under the Clinton administration to regulate greenhouse gas emissions from vehicles. Four years later, the Bush administration denied it.

In 2007, however, the U.S. Supreme Court ruled against the EPA's argument that the agency didn't have the authority to regulate the emissions, and directed the EPA to determine what the existing science around green