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Human activities are the main driver of increasing concentration of greenhouse gases in the atmosphere which is very dangerous as it makes global warming more powerful day by day. Both are hugely related to each other and affecting the natural balance on the earth including life on earth. A huge climate change was observed in the mid of 20th century caused due to the human activities. Increasing level of green house gases in the atmosphere is the indicator of climate change and global warming. All the greenhouse gases through various human activities gets collected to the atmosphere and warm the climate which ultimately leads to many changes around the world.
All the changes in the atmosphere have negative effects over animals, people, plants, society, and environment. Greenhouse gases have capability to stay for long period of time (around tens to hundreds of years) in the atmosphere if once released by any mean and warm the climate by continuously absorbing the heat which persist over a long time and hence affect the present and future generations on the whole planet. Ever green house gases have their own capability to affect the earth’s climate according to the length of time gases remains in the atmosphere. Each one has unique ability to absorb heat and energy of the atmosphere and cause global warming all over the world.
According to the statistics, it has been noted that the emission of total greenhouse gases in the United States was increased by 5 percent from 1990 to 2012; however, it is decreased by 10 percent in the last few years. High level of electricity generation all across the world is considered as the main and largest source of greenhouse gas emissions and then through transportation. Net emission of the greenhouse gases worldwide because of the human activities was increased by 35 percent from the year 1990 to 2010 from which CO2 was alone three-fourths of total emissions.
The concentration of green house gases especially carbon dioxide is increasing continuously since the beginning of the industrial era forcing the climate to change and disturbing the earth’s energy through the warming or cooling effect. The total warming effect of all green house gases has been increased by 34 percent (27 percent of it is only because of carbon dioxide alone). Regular use of fossil fuels, oil, natural gases, coal, solid wastes, trees, wood products, organic wastes and deforestation, transportation and soil degradation is adding more CO2 to the atmosphere.