Postcards from landfills: where one man's trash turns into methane gas

While we here at the Guardian love to keep it in the ground, that is not how we feel about trash. Landfills are collectively one of the biggest emitters of methane gas, which is far more potent at trapping heat in our atmosphere than carbon dioxide. As the trash problem and landfills on our planet all grow, here are some postcards from landfills you'd never want to receive.