Every year, about 8 million tons of fallen leaves end up in landfills.
That's according to Melissa Hopkins of the National Audubon Society, who offers alternatives to raking up leaves and throwing them away.
"A lot of people think that when leaves fall, you need to really quickly scoop them up and get rid of them," she tells NPR's Melissa Block as they take a look Block's backyard in Washington, D.C., covered in a blanket of leaves. "We think about leaves as vitamins. They are free vitamins that naturally occur in your yard."