Can Colo.’s next governor deliver 100% renewable energy?

Two of the Democratic candidates for governor are campaigning on a promise to make Colorado a state that runs on “100 percent renewable energy.”
At least, that’s the version that fits on a bumper sticker.
Turns out, there’s a lot of fine print to go with that promise.
Democratic frontrunner Jared Polis and his fellow Democrat Mike Johnston are both campaigning on the idea.
In a recent 9News gathering with voters, both candidates got questions about this. To some voters, the idea sounded a little grandiose.
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