Most of us don't know the environmental impact of our diets, but according to Matthew Prescott, a vegan diet can help improve the globe by wasting less water and producing fewer toxins.Do you know how many gallons of water it takes to produce one single egg? How about a pound of steak? Most of us don't know the environmental impact of our diets, but according to Matthew Prescott, a vegan diet can help improve the globe by wasting less water and producing fewer toxins. In his book Food Is the Solution, Prescott shows how anyone can incorporate more plants into their diets and therefore help solve the world's biggest issues. Find out how eating less meat may help prevent heart disease, heart attack and stroke. Plus, learn how to cook easy substitutes for your favorite foods -- like bacon. Bonus! The Best and Worst Things You Can Do for Your Gut