They are formed by natural processes like anærobic decomposition. They contain energy from ancient photosynthesis. They can literally be around 650 million years old.
When organisms die they release the nutrients back to the soil
Cardiovascular Diseases refers to a group of illnesses, disorders and in some cases serious abnormalities that affect the heart and blood vessels.
Your circulatory system consists of your heart, blood vessels and blood, and is responsible for transporting life-giving oxygen throughout your body. When you exercise, your body's need for oxygen increases; the harder you work out, the more oxygen your body demands.
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Weathering is the process where rock is dissolved, worn away or broken down into smaller and smaller pieces. ... Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. Mechanical weathering physically breaks up rock.
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