Plastic bags don’t biodegrade, they photodegrade, which means they break into tiny toxic bits that pollute our oceans. Meanwhile, the average American tosses more than 300 plastic bags each year, which has resulted in a plastic bag cemetery the size of two Texases floating in the middle of the Pacific Ocean. Want to make a difference? Bring your own bag, baby! Just say no to that shopper—paper and plastic—and fold up a reusable bag to stash instead. We like the organic cotton or hemp bags from Envirosax, which roll up small enough to fit in your pocket!