Hillary Clinton keeps adopting his positions, but not this one.

The Flint water crisis and America’s toxic infrastructure.

You've heard about how robocars are going to upend the economy. But have you thought about what they'll do to urban space?

Michigan's governor has borne the brunt of the blame, but there's plenty to go around.

Where does the green energy from your panels really go?

Scott Slater wants to pump billions of gallons to LA and other drought-hit cities—and make $2.4 billion in the process.

A moratorium on coal leases is another notch in his legacy. But it will be up to Hillary Clinton or Bernie Sanders to navigate the fallout.

This video shows seven years of global warming proposals—and how he did on each one.

California's biggest contributor to climate change is a rupture at an Aliso Canyon well.