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Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Food scraps make up 25 billion pounds of trash per year in this country—captured energy that could go back into greening the planet. A wilted broccoli stalk, a grapefruit peel, a carrot top. That’s ...