During 1988, Intergovernmental Panel on Climate Change (IPCC) was established. It is known as the leader of intergovernmental body. IPCC carried out that human are the most dangerous who causes of global warming. It is undeniable that mankind lack of concern in environment yet human activities are considered as one of the main causes of global warming. Scientists defined that human activity such as emit excessive amounts of greenhouse gases to the atmosphere contribute to global warming. As known to all, greenhouse gases are the gases that absorb energy from the sun and accumulate within our atmosphere which it is usually will exit into outer space. The greenhouse gases include carbon dioxide (CO2), methane (CH4), nitrous oxide (N20), water vapour and ozone. Different greenhouse gases have very different heat-trapping abilities.
Manmade Co2Emission
Carbon dioxide is a colourless, odourless non-flammable gas and probably is the most prominent greenhouse gas in earth's atmosphere; it released into atmosphere where it remains for 100-200 years. Yet, it causes 9-16% of the greenhouse effect on earth. Mankind use fossil fuels (coal, oil and natural gas) to generate electricity where fossil fuels were created by the decay of plants from millions of years ago. Fossil fuels contain of carbon, when they combusted, and it will form carbon dioxide. Thus CO2 is mainly inevitably emitted when mankind burn fossil fuels, wood product and solid waste. Additionally, the more using of automobile engines will release more carbon dioxide to our atmosphere. While carbon dioxide is the principal greenhouse gas, methane (CH4) is the second most prominent. According to the IPCC, Methane is more than 20 times as effective as CO2 at trapping heat in the atmosphere. CH4 is colourless, odourless and flammable gas which stays in the atmosphere for only 10 years and contributes 4-9% on global warming. Methane normally derived when plants decay and bacteria break down organic matter under oxygen-starved conditions. It occurs when organic matter is trapped underwater, as in rice paddies. Otherwise, it also takes place in the intestines of herbivorous animals, such as cows, sheep and goats. When these animals belch, methane is released meanwhile it is adding a lot of methane to the atmosphere.
