Greener Living

Can You Compost That? A Cheat Sheet on What Goes in the Bin

Are tea bags okay? What about dog poop? Composting do’s and don’ts vary, but getting started may be less complicated — and less messy — than you think.

A person throws a bag of compostable material into a truck in San Francisco.

Photographer: Justin Sullivan/Getty Images
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On a microscopic level, composting refers to a biological process where bacteria, fungi and even worms break down organic material to generate a product that looks like soil but is technically a soil amendment. This nutrient-rich blend can be used to improve soil quality, making it easier to grow everything from house plants to crops.

On a practical level, compost — a product formed in darkness — is increasingly stepping into the spotlight. Earlier this year, New York City announced plans to expand its composting program citywide by late 2024, the latest example of a trend that in the US started with San Francisco’s launch of a composting program in 1996. Other cities, including Seattle, Boston and Boulder, Colorado, have also unveiled composting programs, and in 2020 Vermont went a step further, banning the disposal of food scraps in trash or landfill waste.