Photograph by Harper Collins - National Geographic Society · Photograph by Harper Collins Photograph by rusm / Getty Images Photograph by Mike Kittrell Photograph by Creative Commons

Photograph by Harper Collins

Photograph by rusm / Getty Images Photograph by Mike Kittrell

Photograph by Creative Commons

Photograph by Creative Commons Photograph by Creative Commons

Photograph by Creative Commons Photograph by Creative Commons

LandfillPhotograph by Ralph125 / Getty Images Photograph by Jodi Cobb

Photograph by Mike Kittrell Photograph by gumboot / Getty Images