A scenario: Suppose, for the sake of argument, our best science indicates that the continued use of fossil fuels will have not only great but also profoundly negative consequences for human life on earth. Suppose further that the U.S. manages to substitute nuclear, solar, wind, etc. for virtually all our energy (and switches to electric cars).
Given that scenario, if the powers that be in China conclude that the global environmental movement is a trick by the West to keep them down and, therefore, China keeps building new coal-fired plants and using gas-powered cars, thus creating environmental hazar for the rest of us. Would the U.S. have a legitimate cause of war upon China? Discuss.