There is much evidence supporting the point of view that climate change and global warming is a substantial cause of human activity. According to NASA (2010), human actions like burning fossil fuels have caused 75% of the 20th century increase in the CO2 gas; at Aril 2010 CO2 levels were the highest they have been in the past 650,000 years. As far as CO2 absorbs heat, and it’s amount produced by people rises, it can be a causation of global warming.
In the article "Global Change Impacts in the United States" (2009) it is stated that human produced CO2 is causing environmental change. Measurements in the upper atmosphere from 1979 - 2009, demonstrated the sun 's energy has gone up and down in cycles, with no net increase. While warming is occurring in the lower atmosphere, the upper atmosphere is cooling. If the sun was driving the temperature change there would be warming in the upper atmosphere.
People continue to destroy the forests for wood, so forest will absorb less CO2 in the future, this can lead to huge increase of CO2 in the atmosphere. Intergovernmental Panel on Climate Change (2007) reported that: Greenhouse gases produced by humanity will continue accumulating in the atmosphere causing climate change because the earth 's "carbon sinks" cannot adequately absorb them all. As of 2009, forests, oceans, and other were only absorbing around a half of human-produced CO2. The other half is concentrating in the atmosphere. Thus, there is evidence that humanity affects the condition of nature, and it can be an origin of global warming.
Climate change includes not only global warming, but also hurricane activity. Human greenhouse gas outflows are warming the planet, and climate models by Thomas R. Knutson (2004) demonstrate tha...
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...erests of a free market economy.
Even if natural circumstances affect the climate, still there is no doubt that humanity made a huge contribution to the increase of global warming. So, people should take responsibility for climate change. Climate change consequences are terrible: rising level of CO2, oceanic acidity level increase, glaciers melting, rising sea-level, changing the earth 's hydrologic climate and others. Finally, we should take measures to stop global warming and prevent climate chage, otherwise the future generations will suffer from the mistakes we made. Modern economic model exploits natural resourses. This economic model should be changed in the future to more environmental friendly one. As governor Jay Inslee said: “We are the first generation to feel the sting of climate change, and we are the last generation that can do something about it.”
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