EPA

Senate Majority Leader Mitch McConnell has already signaled that he will oppose significantly altering the gas tax, which is currently 18.3 cents per gallon. He should relent. Here's why.

To honor this second Global Climate Strike today, Gov. Jared Polis and Mayor Michael Hancock must commit to stop building new roads and expanding the ones we have.

Greenhouse gas emissions are often discussed in terms of their weight in tons. You might have a tough time picturing all of that gas hanging out in the sky. But climate cubes can give you an idea of your car's emissions — and those of all the cars along Colorado's Front Range.

The Trump administration revoked a waiver allowing California to set higher automobile emissions standards than the federal government. It's a bad idea.

Today Colorado approved a rule that requires automakers to sell more electric vehicles in the state. The mandate intends to bring a wider range of electric models to car dealers, reduce carbon emissions and clean up polluted air. 

Shoshana Lew, executive director of the Colorado Department of Transportation, went to Washington recently to warn that Colorado will join other states in a lawsuit if the Trump administration wipes out the ability of states to require more efficient gas-powered cars and a wider range of electric vehicles for sale in the state. 

The Trump administration could kill state regulations that limit vehicle emissions and promote the sales of electric vehicles. The new EPA rule, expected this summer, could lead to more pollution in Colorado and push the state further out of compliance with federal air quality standards. If that happens, federal officials could cut off funding for highway and public transportation projects in the state.