The greenhouse effect is the rise in temperature of the Earth because certain gases in the atmosphere such as water vapor, carbon dioxide, nitrous oxide, and methane, trap energy from the sun. These greenhouse gases allow incoming solar radiation to pass through the Earth's atmosphere, but prevent most of the outgoing infrared radiation from the surface and lower atmosphere from escaping into outer space. The greenhouse effect is important. Without the greenhouse effect, the Earth would not be warm enough for humans to live. But if the greenhouse effect becomes stronger, it could make the Earth warmer than usual which is called global warming. Following is the causes of global warming which are suspected to be caused by human and the impact of the global warming towards human health, ecological system and sea level. .
Global warming happens because of the excess emission of the greenhouse gases from the industrial revolution. According to the Schneider, Stephen H (1989) finding, the greenhouse gases include Carbon dioxide, methane, cfcs and nitrous oxide. Since the industrial revolution, the increasing quantities of fossil fuels have been burnt and the carbon locked up in them is released into the atmosphere as CO2. Algae in the sea and plants absorb CO2 as they grow but they are not able to absorb it at the rate at which it is now entering .
the atmosphere. Besides, Methane is produced when bacteria break down organic matter without oxygen being present. These sources have increased as a result of human activity. For example, Partridge, Eudora (1992, p.4) discovered that termites favor grassland areas and because of deforestation, many former forest areas have been turned into grasslands causing an increase the number of termites. Domestic cattle produce more methane than wild animals and as their number increases so does the amount of methane. Other sources of methane are rotting vegetation in melting permafrost, leaks from natural gas pipelines and burning vegetation.