Democrats in the state are divided over two proposed initiatives that would curb fracking near homes and give cities more regulatory power.
From health threats to truck traffic, from rank odors to sinking property values, Coloradans explain what it's like to live near fracking sites.
Because oil and gas production has soared, so has the value of various tax breaks for the industry.
In Colorado's beautiful Thompson Divide, locals are trying to stop drilling before it begins.
He used to invest in coal projects, but he doesn't anymore, and the climate movement is happy to welcome people who've newly seen the light.
In the races where energy is a big issue, both Democrats and Republicans are pledging their fealty to coal, oil, and gas.
It's called, appropriately, Climate Hawks Vote, and it aims to elect outspoken climate leaders to Congress, not just Democrats who quietly vote the right way.
Increasing partisan polarization is driving the two major parties farther apart on environmental policy. Example A: the wind energy tax credit.
"I want to light a fire under you," the president told graduates during a commencement speech at the University of California-Irvine.