Homer stops by Apu's convenience store to buy "the usual" and learns that he can sell grease. He tries to start a business around selling grease but realizes that his approach ends up losing him money.
Fracking is known to be a leading cause of the lack of water in the world. Government and other environmental organizations focus on fracking in order to try and save our water resources. However, animal agriculture uses an exponential amount more than fracking.
Waste from animals is destroying our oceans and water resources. Because of animal agriculture, there is a massive amount of deadzones in the earth's oceans. Different companies talk about plastic bag removal and other conservation habits, but most do not talk about animal agriculture.