Recently, I read an article in a magazine which said that if all people turn vegetarian, the earth will be a better place to live. It explained that some energy is lost at each trophic level. So, due to conservation of energy, if we directly consume plants, we will get more energy for some particular mass. In this way our food requirement will lessen. So, we can get rid of the problem of food scarcity. So, here's the question : I agree that our food requirement will be less because we will obtain more energy for less food. But I think digesting plants directly requires more energy than digesting meat. I want to know if this notion?