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Global Warming

What is global warming?

➢ Global warming refers to the increase in average temperature of the earth, particularly at the lower atmosphere due to the abundant increase of greenhouse gases.

➢ Greenhouse gases in its natural content in the atmosphere are required, for it acts as a greenhouse around the earth. It allows the sun’s rays to pass through the atmosphere but doesn’t let it to escape and creates a surrounding suitable for life. Life cannot exist without green house gases like carbon dioxide, water vapour, methane etc but they should be existing in permissible quantities only.

➢ The problem of global warming arises when people started contributing abundant amount of green house gases which traps more heat in the atmosphere thus increasing the temperature.

➢ Changes resulting from global warming may include rising sea levels due to the melting of the polar ice caps, as well as an increase in occurrence and severity of storms and other severe weather events.

❖ CAUSES OF GLOBAL WARMING
• Scientists have determined that a number of human activities are contributing to global warming by adding excessive amounts of greenhouse gases to the atmosphere.
• Greenhouse Gases and Global Warming
While many greenhouse gases occur naturally and are needed to create the greenhouse effect that keeps the Earth warm enough to support life, human use of fossil fuels is the main source of excess greenhouse gases.
• By driving cars, using electricity from coal-fired power plants, or heating our homes with oil or natural gas, we release carbon dioxide and other heat-trapping gases into the atmosphere. vehicles with poor gas mileage contribute the most to global warming.
• Deforestation is another significant source of greenhouse gases, because fewer trees means less carbon dioxide conversion to oxygen.We are also losing temperate forests.
• Carbon Dioxide from air planes and buildings
Buildings structure account for about...