It was during a cruise in Alaska that Linda Zhong realized that the world didn’t have to be full of plastic. “I grew up in cities, so you’re very used to seeing all kinds of trash everywhere,” says the graduate student in microbiology. Zhong, who is Canadian and lived in Ottawa growing up and in Toronto during college, routinely saw trash in the waters of the Ottawa River and on the beaches around Lake Ontario. “You never see it as anything other than normal.” Alaska changed that. Seeing the pristine,…