By Tanner Garrity When illustrating how royally f*cked our planet is, climate documentaries tend to employ the same slate of unsavory iconography: smokestacks, polluted rivers, disgusting landfills. All present as disastrous and irreversible, in their own special ways. But the landfills are particularly upsetting. They’re not just eyesores, or gathering places for bizarre assortments of garbage — they’re active polluters, which send methane, carbon dioxide and nitrogen dioxide into the atmosphere as the trash degrades. (You know, like a smokestack.) Meanwhile, the toxic chemicals that landfill…