You don't have to be a tennis player to be affected by tennis elbow, an overuse injury causing pain around the outside of the elbow. Tennis elbow, also known as lateral epicondylitis, is believed to affect around one in three people at any time, most often between the ages of 40 and 60.
Itâs theelement that anchors all organic substances, fromfossil fuels to DNA. On Earth, carbon cycles throughthe land, ocean, atmosphere, and the Earthâs interiorin a major biogeochemical cycle (the circulation ofchemical components through the biosphere from orto the lithosphere, atmosphere, and hydrosphere).
The Carbon Cycle. Perhaps the most studied biogeochemical cycle is the carbon cycle, which, as you may have guessed, describes the pathways that carbon takes through living organisms and the environment. The carbon cycle is very different from either the nitrogen or phosphorus cycle. One reason is that the primary source of usable carbon for plants is carbon dioxide in the atmosphere, not the soil, which is where the main sources of phosphorus and nitrogen are for terrestrial plants. Because carbon dioxide is a gas that can move freely through the air and water, the carbon cycle is truly global.