A generation ago, Californians embraced a recycling ethic based on the desire to reduce litter, conserve natural resources, and cut our reliance on landfills. Today, a focus on recycling organic materials is central to California’s efforts to combat climate change.

When landfilled, organic waste—materials such as leaves, grass, agricultural crop residues, and food scraps—generates methane, which has a heat-trapping effect about 80 times greater than carbon dioxide over a 20-year timeline. Reducing methane emissions within 20 years is necessary to avert the worst impacts of climate change.

The good news is that organics are readily recyclable into soil amendments like compost, mulch, and liquid fertilizers, as well as biofuel, a renewable natural gas. This is already happening across California, but because organics is such a large portion of our waste stream (about a third), we need to do more. Food waste alone accounts for about 18 percent of landfill disposal, and we can reduce that percentage by reducing food waste and increasing edible food rescue.

California law (SB 1383, Lara, Chapter 395, Statutes of 2016) targets a 50 percent reduction in the landfilling of organic waste in 2022. By 2025, that reduction target is 75 percent. While some communities already have curbside organics collection services—including food waste collection—additional communities will need to implement organics collection programs to meet these goals.

You can help California meet these goals by setting up a home compost system and recycling at home, by using worms to compost, or by joining your neighbors and co-workers in a community composting project. One of the most powerful things you can do to help California adapt to a changing climate is to use compost and mulch produced in California to sequester carbon in the soil.

CalRecycle is helping build at 21st-century organics infrastructure that will provide jobs, protect the environment, and put organic waste back to work growing food and building healthy soil. You can learn more about CalRecycle's investments in organics management facilities at our Organics Grant Program page.

Organic Waste Prevention at Home

Grocery list

Food Waste Prevention

Plan your meals for the week before you go shop-ping and buy only the items needed to prepare those meals. By making a shopping list with week-ly meals in mind, you can save money and prevent food waste.

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Landscape Waste Prevention

Drought tolerant and sustainable landscaping practices save water, reduce garden waste, and take less work, saving you time and money.

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Compost and Mulch

Hands Holding Compost

What is Compost and Mulch

Learn the difference between compost and mulch and how to use these valuable soil products in your yard.

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Basket of Vegetables

Benefits of Compost

Compost is an enriching soil amendment that increases soil health and water-holding capacity. Compost also helps with water conservation and erosion control and decreases greenhouse gas emissions through carbon sequestration.

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Find a Compost Facility Near You

Biocycle is the leading voice of the composting community. Find a composter near you in California or anywhere in the country.

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Composting at Home

Fenced Vegetable Garden

Home Composting

Mix your food waste with leaves, twigs, wood chips, saw-dust, dried/dead plants, and uncoated paper or cardboard to make a rich soil amendment in your backyard.

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Vermicomposting is the practice of using worms to break down organic material, including food scraps. The resulting material is a mix of worm castings (worm manure) and decomposed food scraps.

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Community-Scale Composting

Community-scale composting programs can help increase local resilience, build sustainability awareness, and provide quality soil amendments for local use.

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Residential Organics Recycling Collection

In September 2016, Governor Brown signed SB 1383 (Lara, Chapter 395, Statutes of 2016), which established targets to achieve a 50 percent reduction of the statewide disposal of organic waste from the 2014 level by 2020 and a 75 percent reduction by 2025. While some communities already have curbside organics collection service—including food waste collection—additional communities will implement organics collection programs to meet these goals.

Learn More about SB 1383



Landfilled Waste Contributes to Climate Change

When organic waste is landfilled, it decomposes anaerobically (without air), resulting in methane gas emissions. Methane is a short-lived climate pollutant. California law targets short-lived climate pollutants because reducing these emissions is critical to averting the worst impacts of a changing climate.


Increasing Soil Carbon for Climate Resiliency

Increasing Soil Carbon for Climate Resiliency

Healthy soils are a critical part of the long-term sustainability of food production and can contribute to reducing greenhouse gases.

Compost Carbon Climate Connection

The Compost-Carbon-Climate Connection

Learn more about the connection between compost, carbon, and climate change.

Putting Cap And Trade Dollars to Work for California

Putting Cap-and-Trade Dollars to Work for California

Learn more about CalRecycle’s investments in organics management infrastructure throughout the state.