analysis of global warming short description
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Global warming is the long-term rise in the average temperature of the Earth's climate system. It is a major aspect of climate change, and has been demonstrated by direct temperature measurements and by measurements of various effects of the warming.[5][6] Global warming and climate change are often used interchangeably.[7] But more accurately, global warming is the mainly human-caused increase in global surface temperatures and its projected continuation,[8] while climate change includes both global warming and its effects, such as changes in precipitation.[9] While there have been prehistoric periods of global warming,[10] many observed changes since the mid-20th century have been unprecedented over decades to millennia.
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‘Global warming’ is one facet of the broader term ‘climate change’. It is the increase in the average temperature of the Earth’s surface air and oceans from the mid-20th century, and the projected continuation. The Global warming is primarily the consequence of building up greenhouse gases in atmosphere. Emission rates for most important anthropogenic greenhouse gas, CO2, have increased 120-fold in the past 140 years. While in the 19th century, emissions were mostly from deforestation and the other land use changes, now they are predominantly from burning fossil fuels. As CO2 in the atmosphere has the lifetime of more than a century, the historic emissions play most important role as compared to the current concentrations in atmosphere.
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