The world just agreed to a major climate deal in Paris. Now comes the hard part.

After two weeks of bleary all-nighters in Paris, diplomats from around the world have hammered out a major global agreement to address climate change. Here's the full 31-page document, which was approved by 195 countries on Saturday.

It's important to be clear on what this wad of paper actually does. The Paris climate agreement hasn't saved the planet and it hasn't solved global warming. Not by itself. Instead, the deal is supposed to add structure and momentum to efforts that are currently u