 Keep it in the ground. It means stop extracting oil, gas, and coal. It's the opposite of drill, baby, drill. And there's real truth to it. There is no way we can stay under the emissions target set by the Paris Accord if we burn through all the oil and gas that's already planned to be developed and sold. And we know that doing that is kind of like intentionally setting our homes on fire because of all the planet-warming emissions it will add to the atmosphere.