Change my mind: I currently think that there are only three big potential strategies for effectively preventing substantial human-caused climate change in the next 40 years. Climate Strategy 1: Government Collaboration If we collaborated, China, the U.S., India, and Europe could engage in substantial climate emission regulation (e.g., by taxing carbon, using cap-and-trade systems, setting deadlines by which certain industries must be carbon neutral, building cleaner power generation f...