[nitrogen]

Eat less and burn more calories, you'll lose weight.

If you put less gasoline in your car, you will produce less pollution. Simple as that. It's just basic conservation of mass. Just don't put as much in at the pump! Easy peasey. Problem solved. Get better mileage and pollute less just by buying less gasoline! Right?

Perhaps instead of focusing on the "moral inferiority" [those are scare quotes, I'm not saying you actually wrote those words] of the obese for their inability to accept basic thermodynamics, we should ask the question of what actually works in the big picture; what will actually produce the motivational or metabolic changes necessary to ensure a positive outcome. Asking what people do who have been thin their whole lives is probably not going to help.