🌊 The Great Pacific Garbage Patch

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The Great Pacific Garbage Patch is a massive area of floating plastic trash in the Pacific Ocean between Hawaii and California. It is more than twice the size of Texas. Ocean currents carry plastic into this area, where it slowly spins around in the water.

As the plastic pieces move and hit each other, they break apart into tiny particles called microplastics and nanoplastics. Microplastics are usually as small as a pencil eraser or smaller. Nanoplastics are even tinier — many times smaller than a human hair.

Scientists from China and the United States studied these particles and found that they may contribute to global warming. The tiny plastics can rise into the air and absorb sunlight, which warms the atmosphere.

Researchers studied the color, size, and chemistry of the plastics. They discovered that colored plastics, especially red, yellow, blue, and black plastics, absorb much more sunlight than clear plastics. Dark plastics act like black clothing on a hot day because they soak up heat.

The scientists also discovered that smaller particles absorb more sunlight and stay in the atmosphere longer. Nanoplastics may be tiny, but they can have a powerful effect on warming.

As plastics age, they often become darker and absorb even more heat. Scientists tested this in laboratories using ultraviolet light.

The warming effect from plastics is smaller than major pollutants like black carbon, but researchers say it is still important. In some parts of the ocean with large amounts of plastic pollution, the warming effect may even become stronger than black carbon.

The study shows that plastic pollution is not only dangerous for oceans and wildlife. It may also contribute to global climate change.