Thousands of years ago, the earth was beautiful, skies were clear and smog-free, the ocean was rare with toxins, and man did not suffer much from pollution. However, the industrial revolution came into effect, as technology brought the world into a new era of possibilities. This new era also brought along pollution, whereas automobile exhausts and power plants emitted poisonous toxins into the air. The increased emission of these harmful gases into the earth's atmosphere has eventually caused a problem that could warm up the earth. This warming effect is commonly referred to as global warming.
             Global Warming has been slowly heating up the earth due to natural reasons and human activity. The earth's atmosphere is composed of "greenhouse gases" which are primarily carbon dioxide, methane, and nitrous oxide. When the sun emits heat and radiation into earth's atmosphere, the earth subsequently reflects back the radiation into space, but the layer in the atmosphere or greenhouse gases deter part of the radiation, leaving a few stuck back on earth. This heat-trapping effect is formally known as the Greenhouse Effect.
             As energy from the sun passes through the atmosphere a number of things take place. average about 51 % of the sun's radiation reaches the surface. This energy is used to heat the Earth's surface and lower atmosphere, melt and evaporate water, and run photosynthesis in plants. Of the other 49 %, 4 % is reflected back to space by the Earth's surface, 26 % is reflected to space by clouds and atmospheric particles, and 19 % is absorbed by atmospheric gases, particles and clouds.
             The heating of the ground by sunlight causes the Earth's surface to become a radiator of energy in the long wave band (sometimes called infrared radiation). This emission of energy is generally directed to space. However, only a small portion of this energy actually makes it back to space. The majority of the outgoing infrared radiation is absorbed...