The Environmental Protection Agency under President Donald Trump has served notice it wants to back away from at least 30 major rules that seek to protect air and water and reduce emissions that cause climate change. The agency's administrator, Lee Zeldin, says doing so would mean a new "golden age" for America.

It's not certain the rules will go away. They can't be changed without going through a demanding federal rulemaking process.

But an examination by The Associated Press found that gutting the rules would come with high costs in both money and lives.

Here are some takeaways from AP's work:

Hundreds of billions of dollars in costs, thousands of deaths

The AP examination found that the targeted rules are estimated to save at least $275 billion a year and more than 30,000 lives ann

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