A new executive order mandates that for every regulation created, two regulations must be eliminated.
Environmentalists say a 55-foot tall wall would cause lasting damage.
TransCanada, the company behind the infamous project, has resubmitted an application to build the pipeline across the U.S.-Canada border.
On Monday, President Trump signed an executive order to get rid of the TPP, but environmentalists aren't thrilled.
Welcome to the America First age.
There will be a big, federal-sized hole in climate ambition, but California, Iowa, and Massachusetts, among others, are stepping up.
Here are people who did a rad job of covering climate change and other green issues in 2016.
In the coming four years, expect more like this from states unwilling to put up with backsliding.
Trump pick Mick Mulvaney wears his climate change denial proudly.