Add Yahoo as a preferred source to see more of our stories on Google. A person unloads groceries from plastic grocery bags - Torgonskaya Tatiana/Shutterstock Plastic grocery bags can be hard to avoid.

Dr. Elizabeth Yuko is a bioethicist and adjunct professor of ethics at Fordham University. She has written for The New York Times, The Washington Post, The Atlantic, Rolling Stone, CNN & Playboy. For ...