What are the origins and current sources of nitrogen, oxygen, argon, carbon dioxide, neon, helium, and methane in the earths atmosphere.

... with CO2 and methane from 2009) and do not represent any single source. The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper ... heavier molecules including nitrogen, oxygen and carbon dioxide closer to ...

Tundra is one of the biggest carbon dioxide sinks on Earth. ... As a result of climate change, tundra soils are thawing deeper and deeper and for a longer periods of time in the upper layers of permafrost. This causes organic matter to decompose faster, releasing larger amounts of carbon dioxide into the atmosphere.