This short interview from the Real News Network illustrates the progress of clean energy generation in the US, compared with dirtier sources. The argument is that the cost of renewables is falling fast, such that they are becoming cheaper than coal-fired generation, which Mr Trump has promised to support. Cleaner sources also have positive spillover effects on health, known in economics as a positive externality.
The logic of market forces has probably been helped along by industrial policies, from Obama’s Clean Power Plan to the Chinese government, which has promoted the development of its solar panel industry. But if clean energy becomes cheaper than dirty energy, surely a Republican president looking for a good deal can’t argue with that.