On November 4, the Paris Climate Agreement will enter into force, less than a year after the final negotiations wrapped up, writes David Hart in Morning Consult. It commits the nations of the world to keep global average temperatures from rising by more than two degrees Celsius. This goal sounds simple but it implies an extraordinary transformation of the world’s energy system—the end of coal, oil, and natural gas as we use them today—in less than forty years. The stark truth is that we do not yet have the technologies and systems that we will need to make this transformation. Low-carbon energy innovation is an idea that a broad coalition ought to get behind: right, left, and center.