Trump races against clock to roll back major Obama-era environment rules

The administration's lengthy slate of rollbacks will slow progress on reducing air pollution and greenhouse gases that warm the planet, health experts say

Donald Trump's administration is racing against the clock to rescind or rewrite every major pro-environment policy enduring from Barack Obama's presidency - but the government will probably not be able to usher those changes through the courts before the next presidential election.

Green-minded states and advocates cannot sue until regulations are final, and it could take years for the courts to rule. In the interim, the lengthy slate of rollbacks will slow progress on reducing air pollution and greenhouse gases that warm the planet, health experts say.