Global warning has already hit the danger point that international attempts to curb it are designed to avoid, according to the world's top climate watchdog.
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Dr Rajendra Pachauri, the chairman of the official Intergovernmental Panel on Climate Change (IPCC)
Dr Rajendra Pachauri, the chairman of the official Intergovernmental Panel on Climate Change (IPCC), told an international conference attended by 114 governments in Mauritius this month that he personally believes that the world has "already reached the level of dangerous concentrations of carbon dioxide in the atmosphere" and called for immediate and "very deep" cuts in the pollution if humanity is to "survive".
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Global warming refers to the increase in the average temperature of the Earth's near-surface air and oceans. The Global Average Air Temperature near the Earth's surface has risen by 0.74 0.18 C during the past century. The main cause of this Global warming is attributed to the Green House Effect. Green House Effect is the process by which absorption & emission of infrared radiation by atmospheric gases warms a planet's atmosphere & surface. Greenhouse Gases make the Earth warmer by trapping energy in the atmosphere. These Gases viz. Water-Vapor, Carbon Dioxide, Methane & Ozone etc. create a natural greenhouse effect, without which mean temperatures on Earth would be an estimated 30 C lower so that Earth would be uninhabitable.
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. Even a little extra warming may cause problems for humans, plants & animals. Even a