The greenhouse effect refers to the increasing warming of the earth because of gases in the atmosphere that trap the sun's energy on earth. This blanket of gases acts the same as the glass roof of a greenhouse. It allows the sun's energy to pass through it to reach the earth, but prevents some of the energy from escaping back into space since the time of the Industrial Revolution, the quality of Greenhouse Gases in the atmosphere has increased x 90. This increase in Greenhouse Gas concentration is trapping heat on the Earth and warming the earth beyond its normal temperature, with probably dire consequences for the planet and its inhabitants.
Carbon dioxide is clearly the most important cause of the human-made greenhouse effect.
If the present trend continues, the contribution of CO2 will become considerably higher by the year 2100. Global Climate Change One of the major effects of greenhouse gas emissions will be global warming. Assuming that no actions are taken to reduce emissions, computer models of the earth's climate predict that global average temperatures will rise by 1.5 to 4.5 degrees C over the next 100 years. This rise is larger and probably faster than any such change over the past 9,000 years. The consequences of global warming will be serious for both human beings and the ecosystems which support all life on earth.