The world is warming. Global warming refers to the rising average temperature of air and Ocean on the earth's surface since the 20th century, which is expected to continue. Evidence shows that for every 0.6 degree rise in temperature, 150000 people die every year as a result of the negative effects of global warming. Among them: glaciers, permafrost and sea ice are disappearing, sea water level is rising, seasonal imbalance and weather become more extreme. When the temperature rises further, it will cause more floods, droughts, pestilence, famine and other situations, and damage the entire ecosystem.
To achieve the best energy efficiency, it is necessary to effectively use energy, reducing power, make less energy to provide the same level of effect. In the face of energy shortage problem, improve energy efficiency is one of the most economic and effective method to improve. At the same time, reduce emissions of carbon dioxide when electricity production, can effectively slow climate change, reduce damage made of global warming on the earth.