What happens to all the plastic we throw away? Only about 9 percent of it gets recycled. Most of the rest ends up in landfills, where it’s buried under layers of dirt. Experts can only guess how long that plastic takes to decompose, or break down. It may take centuries.
But a lot of plastic trash never makes it to landfills. Instead, it becomes litter on the street. Rain and wind carry plastic bags, bottles, and other debris into storm drains or rivers that flow to the ocean.
When plastic waste ends up in the ocean, the results can be tragic. Last year, a dead sperm whale washed ashore in Spain. Scientists found that it had eaten 64 pounds of plastic trash, including plastic bags, fishing nets, and even a plastic drum.
It’s not just big pieces of plastic that can be dangerous, though. In the ocean, sunlight and waves often break down plastic into much smaller pieces, called microplastics. Even these tiny bits of plastic contain chemicals that can harm the seabirds, turtles, and fish that accidentally swallow them. This can have an impact on the whole food chain.
“It affects not just the individual animals that eat plastic but the animals that eat those animals,” says Matthew Savoca. He is a scientist who studies the effects of plastic on marine life.