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 Earth’s atmosphere is the relatively thin layer of gases surrounding the planet ... These three gases make up 99.9% of the atmosphere. The remaining gases are found in much smaller proportions.

Let’s look at how this agreement was critical in protecting the health of our planet and all its species, while also reducing greenhouse gases in the atmosphere. The ozone layer is a thin shield ...

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, ...