Is it dusty in here? A recent map of small airborne particles called aerosols captures dust on the Arabian Peninsula and smoke in Russia and the United States.

Aerosols are tiny particles, either solid or liquid, in the atmosphere. They come from smoke, from volcanic eruptions and dust storms, and from the burning of fossil fuels. Unlike the carbon dioxide released from burning oil and coal, however, aerosols tend to cool the atmosphere instead of warming it, according to NASA Langley Research Center.

This aerosol map is from data collected July 19 by the Suomi NPP satellite, according to NASA's Earth Observatory. The darker the orange, the denser the aerosol concentration.

Along the Arabian Peninsula and over the Sahara Desert of Africa, dense concentrations of aerosols come from sandy dust kicked up by winds. Some of this dust reaches out over the Atlantic Ocean. Dust plumes frequently blow across the Atlantic, often reaching all the way to North America.

In Russia, a dark plume of aerosols marks a fire in Siberia. Fires also kick up aerosols in northwest Canada and over the Midwestern United States.

Aerosols also form in forests, where gases and particles released by plants mix. A 2013 study found that this "plant pollution" might help cool the climate by boosting cloud formation — though the effect offsets only about 1 percent of global warming caused by human activities.

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