The natural greenhouse effect is crucial （决定性的） for maintaining the proper temperature needed to sustain (支持、 支撑）life on Earth.
BUT :
THE GLOBAL WARMING!!!
Our opinions and suggestions
What is greenhouse?
Definition
The so-called greenhouse effect is short-wave solar radiation through the atmosphere into the ground, and warming the ground after the length of radiation being released in the atmosphere by absorbing carbon dioxide and other substances, thereby creating the effect of atmospheric
Estimates（估计） of global average temperatures have projected an increase of as much as 5°C before the year 2100. Such a rise in global temperature would produce new patterns and extreme drought and rainfall, which would seriously disrupt food production. This could potentially cripple the North American corn belt , which produces much of the world's grain, leading to much higher food prices, and even less food for the Third World than they already have.
The Greenhouse Effect
Team members：汪宇 刘凯 孙航is greenhouse?
How does it influence us?
What are the factors?
What has been done to settle it?
Global warming
Temperature
A worldwide greenhouse effect might produce a dangerously warmer world.
Since the late 19th century, the average global temperature has increased between 0.3° C and 0.6 ° C. Internationally, 2010 was the hottest year on record since official weather records first started being kept by the British in about 1860.
atmosphere
make carbon circulate a
disequilibrium and have changed the energy of
the Earth biosphere conversion form. And finally
become global warming.
What had we done
warming.
Greenhouse gas:
Carbon dioxide is not the only greenhouse gas.
Other gases, such as methane (CH4) and nitrous (氮的、硝的） oxide (NO), are even stronger infrared （红 外线的）absorbers.
The other serious worry is that rising sea levels from the melting of the polar ice could severely flood many countries. A rise in sea levels of one metre, which many experts are predicting by the year 2100 (and some as soon as 2030), would flood 15 percent of Egypt（埃及）, and 12 percent of Bangladesh(孟 加拉国). The Maldives (马 尔代夫）in the Indian Ocean would almost completely disappear.
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What are the factors?
The mankind burning coal, oil, natural gas and tree
and produce a great deal of carbon dioxide and
methane so many years, those gases get into the
What has been done to settle it?
Kyoto Protocol
《京都议定书》（英文：Kyoto Protocol ， 又 译 《 京 都 协 议 书 》 、《京都条约》；全称《联合国 气候变化框架公约的京都议定书 》）是《联合国气候变化框架公 约 》 （ United Nations Framework Convention on Climate Change，UNFCCC）的 补充条款。是1997年12月在日本 京都由联合国气候变化框架公约 参加国三次会议制定的。其目标 是“将大气中的温室气体含量稳 定在一个适当的水平，进而防止 剧烈的气候改变对人类造成伤害 ”。