We learned from Eric Sala's book The Nature of Nature that humans and our domesticated meat food sources make up 96% of the terrestrial mammals on the planet. That means that ALL the other mammals on earth, the bears and chipmunks and wallabies and prairie dogs and tigers and mice are ONLY 4%. 

Our rising demand for meat to eat is hurting the diversity of animal life on our planet and every vegetarian or vegan meal that we choose to cook/order/reheat makes a difference!