Tiny solid and liquid particles suspended in the atmosphere are called aerosols. Windblown dust, sea salts, sulfates, smoke from wildfires and pollution from factories are all examples of aerosols. Depending upon their size, type and location, aerosols can either cool the Earth's surface or warm it. They can help clouds form or inhibit cloud formation. And if inhaled, some aerosols can be harmful to people’s health. To study aerosols and their impact on clouds, researchers from NASA’s Global Mod