Global Warming is when the earth heats up (the temperature rises). It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the earth’s atmosphere, which increases the temperature. This hurts many people, animals, and plants. Many cannot take the change, so they die.Many reasons may be there for the Global Warming, Primary and main cause is considered to be the Green House Effect. This effect is mainly caused by Carbon Dioxide, Methane, Chlorofluoro Carbon, Nitrous oxides etc gases. These gases form a cover in the atmosphere around the Earth through which hot rays of the Sun can enter to the Earth but cannot exit. So, the heat of the Sun remains in the lower circle of the Earth making the temperature rise.
It is feared that the world may experience rise in temperature of about 4° to 5°C by 2050. The average temperature of the Earth has risen by about 1°C in last five centuries and of this half of the warming is caused in Twentieth Century alone. The Global Warming is increasing at an alarming rate.
Global warming is affecting many parts of the world. Global warming makes the sea rise, and when the sea rises, the water covers many low land islands. This is a big problem for many of the plants, animals, and people on islands.
Global warming is doing many things to people as well as animals and plants. It is killing algae, but it is also destroying many huge forests. The pollution that causes global warming is linked to acid rain. Acid rain gradually destroys almost everything it touches. Global warming is also causing many more fires that wipe out whole forests. This happens because global warming can make the Earth very hot. In forests, some plants and trees leaves can be so dry that they catch on fire.
Due to the rise in average temperature of the Earth, agricultural crops, forests and life growth is affected adversely. It also changes balanced equations of marine life. Melting of glaciers will result in the rise of sea level posing a threat upon the habitat of coastal areas.
Because of these dangerous effects of ‘Global Warming’, at the international level measures are taken in the form of conferences, agreements and research.