全球变暖主要影响因素（Global warming is a major factor）.docVIP

全球变暖主要影响因素（Global warming is a major factor） Water vapor is the worlds richest greenhouse gas, but its status in global warming has been controversial, according to the daily science website. More recently, researchers have used the latest NASA satellite data, more scientific and accurate estimate its heat trapping ability in the air, to make sure it is an important factor of climate change. The research, funded by NASA, has been published in geophysical research letters by the American geophysical union. Water vapor is identified as a major contributor to climate change When we talk about greenhouse gases and climate change, carbon dioxide is often most widely attention, while carbon dioxide is by far the most major component of greenhouse gases, but there are some other gases. What all greenhouse gases have in common is that they allow the suns rays to enter the atmosphere, but absorb some of the infra-red radiation emitted outward and warm the atmosphere. Greenhouse gas helps to keep the earths surface temperature in a more pleasant - nearly 59 Fahrenheit ° F (15 ℃). But as human activity produces more carbon dioxide, earths average temperature is rising and causing dangerous climate change. Carbon dioxide is often blamed for the crisis, which accounts for 80 per cent of greenhouse gas emissions. When home heating, cars, factories and plants burning fossil fuels such as oil, natural gas and coal, when cut down or burn the forest, when the production of cement, we took the carbon dioxide emissions into the atmosphere. Like carbon dioxide, methane and nitrous oxide predate human beings on earth, but the presence of humans increases their levels dramatically. Sulfur hexafluoride, fluorocarbon and HFCS are greenhouse gases produced by human activities. The emissions of these gases are also increasing. Water vapour is also a natural greenhouse gas, which increases with the warming of the climate, thus exacerbating the greenhouse effect caused by human activities. Tex