A layer of charged particles, called the ionosphere, surrounds Earth, extending from about 50 to 400 miles above the surface of the planet. Disclaimer: AAAS and EurekAlert! are not responsible for ...

The atmosphere has four layers. The troposphere is the layer closest to the surface of the Earth. Next is the stratosphere, which is where commercial airplanes fly. Further out is the mesosphere ...

The Earth’s atmosphere is the relatively thin layer of gases surrounding the planet. The atmosphere is held close to Earth by gravity, but the higher you go away from the Earth’s surface ...

Human activities have been the main cause of rising carbon dioxide levels in our atmosphere since the 1800s. The emergence of life on our planet added a new layer to the carbon cycle. As plants grow, ...