Imagine the United States sending low-calorie food aid to Ethiopia in response to the global obesity epidemic. Absurd, right? Even if global waistline trends are worrisome, Ethiopians didn't create the problem. Such a policy would be futile since it would have no noticeable impact on the global aggregate.
Worse, while obesity may be a very real concern, Ethiopians are understandably more focused on undernourishment. The United States should aim instead to increase caloric intake in that part of the world. To punish those we should be helping when we can't even tackle the obesity problem at home makes the policy not only misguided, but also morally dubious.
Sadly, that is pretty much what the United States does on energy. In response to rising global carbon dioxide emissions, the U.S. government put restrictions on the Overseas Private Investment Corporation, a federal agency that is a principal tool for promoting investment in poor countries. A recent rule, added in response to a lawsuit brought by Friends of the Earth and Greenpeace, imposes blind caps on the total CO2 emissions in OPIC's portfolio, which ends up barring the agency from nearly all non-renewable electricity projects.