video reflection 【An inconvenient truth】

From the presentation of the global warming, it shows that the issues caused by excess green house gases emission become worse in the past century In this summary, global warming defined as the problems and effects caused by excess green house gases emission and resist the heat ray reflect to the space, thus it lead the temperature increase and climate change. The following topics will be discussed in this summary, which are the reasons why the global warming exist, what disasters caused by global warming and effect and what will be earth look like in the future.

Firstly, the global warming issues existed in the past 1 to 2 century, the main factor is because of human activity and factory. After the industrial revolution, a large amount of factories existed, and it leaded a large amount of fuels combustion for the purpose of power supply. In the past decay, human activities seems to be the other main factor which caused global warming. For example, car, electronic devices, factories and power plant, etc. Those of the factors cause dozens of tones of carbon dioxide and other green house gases. According to the figure in the presentation, it shows that global warming gases emission will increase rapidly in the following 50 years. As the warming gases concentration increase, temperature increase relatively. Thus, it will leads several serious disasters exist.

Secondly, in the past decay, amount of disasters exist worldwide, the main reason is because of global warming. For examples, storm, typhoon, cyclone, water shortage, flood, temperature increase rapidly, etc. In Asia, a large amount of cities facing the flood problem frequently in the rainy season, it leaded the people become homeless and food shortage. In America, several of cyclones exist every years, it leaded billions of loss in economy . In the center of Africa and north China, people facing the problem of water shortage every day. In tropical region (e.g Hong Kong), storm and typhoon happened 4 seasons every year. In Euro, the temperature increase rapidly every summer, and lead a large amount of people died because of sever sunstroke. Those are the disasters which caused by global warming worldwide.

Finally, as the green house gases emission continuous increase rapidly in the future, global temperature will increase relatively, it will leads the the velocity of ice melting in North-South Pole become faster. When it happen, the cities and countries which is just higher than sea level nowadays will become under sea level, and covered by water, which is not suitable for human to live anymore. In addition, the cities which is next to the river or harbour will possible experience flood or covered by sea water of whole area. Moreover, a dozens tones of fresh water will flow to sea straight forward while the river covered by sea, and water will become salty. After all ice melted in North-South pole, there will be no refrigerant in the earth, thus, the temperature will increase and never cool down, the earth will like a sauna, and not suitable for human to live anymore.

In conclusion, as the information shows that the effects and issues to global,  human should reduce the green house emission as soon as possible, because it is a crisis to human, and may be lead human to become distinction.