Waste & recycling

What waste and recycling are

Municipal solid waste is the everyday trash a household produces: food scraps, packaging, paper, plastic, glass, metal, yard trimmings, furniture, and old electronics. The EPA tracks it as the waste stream that flows from homes, schools, and businesses into the country's disposal system.

That system has 3 main destinations. Landfills bury waste in the ground, and they take the largest share at about 50%, the EPA reports. Recycling and composting recover materials for reuse, handling about 32% combined. Incineration, also called waste-to-energy, burns waste to reduce its volume and generate electricity, taking about 12%. Recycling is the process of collecting used materials, sorting them, and remaking them into new products, which keeps them out of a landfill and reduces the demand for raw resources. Each destination carries a different set of environmental effects, and where a community's waste goes shapes what it lives with.

The waste stream is not evenly divided, and knowing what fills it points to where the problem starts. Paper and cardboard make up the largest category at about 23% of municipal solid waste, the EPA reports. Food follows closely.

Food waste is the single largest category sent to landfills. Americans throw away about 63 million tons of food a year, and the EPA estimates that food makes up about 24% of what reaches landfills, more than any other material. Plastics account for about 12% of the waste stream and grow harder to manage each year, since most plastic cannot be recycled and breaks down into smaller fragments rather than disappearing. Yard trimmings, metals, glass, and textiles fill out the rest. Electronic waste is the fastest-growing segment. The United States generated about 6.9 million tons of e-waste in 2019, according to the UN's Global E-waste Monitor, and only a fraction was properly recycled, leaving the rest to carry heavy metals into landfills and informal disposal streams.

How landfills and waste facilities affect local air, water, and land

A landfill is not an inert pile. It is a chemical reactor that works for decades, and it affects the surrounding environment through 2 main pathways: gas into the air and liquid into the ground.

Landfill gas is the air problem. As organic waste like food and paper decomposes without oxygen, it produces landfill gas, roughly half methane and half carbon dioxide, along with volatile organic compounds. The EPA reports that municipal solid waste landfills are the third-largest source of human-related methane emissions in the United States, releasing the equivalent of the greenhouse gas from more than 20 million passenger vehicles a year. The VOCs and other gases carry odors and can irritate the airways of people living nearby.

Leachate is the water problem. When rain filters down through buried waste, it picks up dissolved chemicals and forms a contaminated liquid called leachate. The USGS has documented leachate carrying heavy metals, ammonia, and organic contaminants, and where a landfill liner fails or an older site was built without one, that liquid can reach groundwater. The EPA has found that older, unlined landfills are a common source of groundwater contamination, which matters most in the communities that draw drinking water from wells near these sites.

What recycling actually does and does not do

Recycling works, but not the way most people assume. When it functions, it keeps materials out of landfills, cuts the energy needed to make new products, and reduces pollution. Recycling aluminum saves about 95% of the energy required to make it from raw ore, the EPA reports, and recycling paper and glass delivers real savings too.

The limits are steep. The US recycling rate for municipal solid waste is about 32%, the EPA reports, far below what most people believe they achieve. Plastic is the clearest gap. Only about 5 to 6% of US plastic waste was actually recycled in recent years, according to a 2022 analysis by Greenpeace, because most plastics are expensive to process, degrade in quality each time, and have no market to buy them back. Contamination compounds the problem. When food, grease, or non-recyclable items mix into a recycling bin, they can spoil an entire load and send it to a landfill. The system also lost a major outlet in 2018, when China stopped accepting most US recycling imports, leaving many domestic programs without a buyer. Recycling remains worthwhile, but it is not a solution to the volume of waste a household produces, and reducing and reusing come first for a reason.

Waste does not stay contained within a landfill's boundary. It reaches the soil and the wider environment through several paths, and the contamination can persist for generations.

Leachate is the direct route into the ground. When it escapes containment, it carries heavy metals like lead, cadmium, and mercury into surrounding soil and groundwater, and the EPA notes that these metals do not break down over time. E-waste adds to the load, since discarded electronics contain lead, mercury, and other toxic metals that leach out as the devices degrade. Improperly disposed household hazardous waste, including paint, batteries, pesticides, and cleaning products, contributes its own contaminants. Older, closed landfills present a lasting risk. Many were built before modern liner requirements, and some now sit under redeveloped land, including housing and parks, where the contamination they hold still moves through the soil. The connection to household environmental health runs through the same channels as other land exposures: contaminated soil becomes dust that drifts indoors, and contaminated groundwater reaches the wells that supply homes.

Who is most at risk from living near waste infrastructure

Waste facilities are not sited evenly, and the burden falls hardest on the communities with the least power to refuse them. Low-income communities and communities of color are disproportionately likely to live near landfills, incinerators, and transfer stations, a pattern that federal research and decades of studies have documented.

The environmental justice movement traces its origin to waste. In 1982, residents of predominantly Black Warren County, North Carolina, protested the siting of a hazardous waste landfill in their community, and the demonstrations drew national attention to the practice of placing waste facilities in communities of color. A 1987 report by the United Church of Christ, Toxic Wastes and Race in the United States, found that race was the single strongest predictor of where hazardous waste facilities were located, a finding a 2007 follow-up study confirmed remained true 20 years later. The EPA's own Office of Environmental Justice has acknowledged the disparity. Residents near these facilities face higher exposure to landfill gas, odors, truck traffic and its diesel exhaust, and the particulate and VOCs that worsen asthma and heart conditions. Children in these communities carry the greatest risk, since they breathe faster relative to their body size and spend more time in contact with soil and dust. The households that generate the least waste per capita are often the ones living closest to where it ends up.

What a household can do

Reduce first, because the waste you never create is the waste no facility has to hold. The EPA ranks reduction and reuse above recycling for exactly this reason. Buy less packaging, choose durable goods over disposable ones, repair items instead of replacing them, and use reusable bags, bottles, and containers to cut the volume at the source.

Tackle food waste next, since it is the largest category reaching landfills and the largest source of the methane they release. Plan meals, store food properly, use leftovers, and compost scraps at home or through a municipal program, which keeps organic waste out of the landfill and turns it into soil instead. The EPA offers guides for both backyard and community composting.

Recycle correctly rather than hopefully. Check your local program's list of accepted materials, since rules vary widely and wishful recycling contaminates loads. Rinse containers, keep food and grease out of the bin, and never bag recyclables unless your program requires it. Dispose of hazardous waste properly. Take paint, batteries, pesticides, and cleaning products to a household hazardous waste collection site rather than the trash, and recycle electronics through a certified e-waste program, which many manufacturers and retailers offer for free. If you live near a landfill or waste facility, test your water if you rely on a private well, keep bare soil covered to limit dust, and know that the EPA and your state environmental agency accept complaints about odors, gas, and contamination. Use your voice on siting decisions too, since landfill permits and facility expansions are decided in public proceedings where residents can comment, and those decisions determine what gets built near which neighborhoods.