精选优质文档-倾情为你奉上 Plant and Disease Plants make up the majority of the earths living environment as trees，grass，flowers，and so on. Directly or indirectly，plants also make up all the food on which humans and all animals depend. Even the meat，milk，and eggs that we and other carnivores eat come from animals that depend on plants for their food. Plants are the only higher organisms that can convert the energy of sunlight into stored，usable chemical energy in carbohydrates，proteins，and fats
