Obesity contributes to global warming, too.
Obese and overweight people require more fuel to transport them and the food they eat, and the problem will worsen as the population literally swells in size, a team at the London School of Hygiene & Tropical Medicine says.
But don't most healthier diets increase methane production? Trade-offs.
At least the article gets the demand/quantity demand thingy right:
"Promotion of a normal distribution of BMI would reduce the global demand for, and thus the price of, food."