Earth Science: Atmosphere
The Earth is surrounded by a gaseous layer that makes life as we know it possible. The atmosphere protects us from dangerous radiation from space and provides us with breathable air. The sun is the engine of atmospheric processes. Its energy affects daily and long-term weather patterns, as well as determining the boundaries of different climate zones.
During the last few million years, the Earth’s climate has undergone several significant natural changes. However, human beings have increasingly begun to play a major role in changing the climate. Few scientists today deny the reality of global warming. Nonetheless, in spite of international efforts and agreements, it is questionable whether these efforts can do more than slow down this global trend.