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Recently, more and more people have questions about climate change and what causes can affect it. The reason of that are affected by both nature events and human actives. According to the World Meteorological Organization ¡§climate is the average weather, including seasonal extremes variations, either locally, regionally, or across the globe¡¨. The differences between weather and climate is that weather can change fast from day by day, but the climate changes very slow. Deforestation, various agricultural, and industrial practices are all effect concentration the greenhouse gases. Greenhouse gases may be define several gases which can produced by nature and human actives such as carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and ozone. They can effect the increase in the temperature of the earth¡¦s atmosphere. The purpose of this essay is to discuss the role and process of human activity played in causing climate changes.
Carbon dioxide is the biggest amount of the green house gases, were increasing by 0% over the last 00 years. It caused by changes in land use (deforestation) ,also burning coal, oil, and natural gas such as in some automobiles, industry. If this situation continuing, the amount of Carbon dioxide will be double during 1st century and the other greenhouse gases will increase too. According to the World Meteorological Organization 000 ¡§the rise of globally averaged surface temperature relative to 11 is 1 to .5 degrees by the year100,and will continue to increase. Because most greenhouse gases will stay for a long time.¡¨ Clearing land for logging, ranching, and agriculture also caused the carbon dioxide, although a little amount of that, for the long term, about 0% carbon dioxide came from the land use changes.
As a contributor to climate change, methane (natural gas) is the second of the important of the greenhouse gases by human activities. It is come from rice cultivation, cattle and sheep ranching. Human activities has contribute 145% above it naturally present . According to the U. S Environmental Protect Agency over the last two centuries, methane concentrations in the atmosphere have more than doubled, because of human activities. Chlorofluorocarbons used in air conditioning and refrigeration. Although it is a small amount of the greenhouse gases, if people still unconcern about it ,the risks will rise.¡§Ozone in the troposphere, that is the lower part of the atmosphere, is another important greenhouse gases from industrial.¡¨ (United Nations Environment Programme World Meteorological Organization 000 ) It is come from both nature and human actives ,for example motor vehicle and power plants. Thus Ozone is the important gas which increase the greenhouse effect.
In conclusion, climate changes was the natural effect in the past, but recently it was changed rapidly. The reason of that is the human activities such as burning coal, oil and automobile (increase a lot recently ), industry, and electricity generation, they contribute huge amount greenhouse gases which effect the climate changes. So people have to concentre of greenhouse gases and climate changes and find the solutions to solve them. United Nations Environment Programme World Meteorological Organization 000
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