Carbon in the form of
carbon dioxide is used by plants to prepare glucose by the process of
photosynthesis. The glucose is used to provide energy and to convert into other
organic compounds When animals eat plants it enters the body of animals. During
respiration energy and carbon dioxide are produced. The carbon dioxide goes
back into the atmosphere. Another process which adds carbon dioxide back into
the atmosphere is the combustion of fuels like coal and petroleum. The organic
compound in plants and animals are also converted into carbonates, limestone,
coal, petroleum, exoskeletons (shells) of some animals.
Carbon is an essential component of
biological molecules like carbohydrates, fats, proteins, vitamins, nucleic
the green house effect
Gases like carbon
dioxide, methane, chloro fluro carbon(CFCs) traps
the heat radiated by the earth and prevents the escape of heat from the earth.
The increase in the presence of these gases in the atmosphere causes increase
in the temperature of the atmosphere. This is called the greenhouse effect.
Greenhouse effect can cause melting of
polar ice, increase in sea levels, flooding of coastal areas and submerging of