Keeping slim is good for the planet, say scientists. When it comes to food production, moving about in a heavy body is like driving around in a gas guzzler, the heavier our bodies become the harder and more unpleasant it is to note about in them and the more dependent we become on our cars. Staying slim is good for health and for the environment. We need to be doing a lot more to reverse the global trend towards fatness, and recognise it as a key factor in the battle to reduce emissions and slow climatic change (courtesy, ScienceDaily).