Global climate change is caused by the greenhouse gases released from a lot of fossil fuel combustion emissions. Based on the global warming impact, a number of extreme weather like snow, hurricanes, floods, drought are frequently staged around the world. Global warming has caused glaciers collapse melt, sea level rise, food production, species extinction and so on. Before the arrival of an irreversible catastrophe such as global warming, we only save the energy, reduce the emission of greenhouse gases, give up fossil fuels and switch to renewable energy. At the same time, we should protect the forests. Only through multi-pronged approaches can we effectively win the combat of the trend of global warming.

Climate change is the significant change on the average state of climate statistics or continues a long period of time (typically 10 years or longer). Climate change may be caused by natural internal processes or external forcing, even change the components of the atmosphere man-made and persistently.

In the first paragraph of United Nations Framework Convention on Climate Change, the climate change is defined as after a considerable period of observation, in addition to natural climate change, climate change in global atmospheric composition caused directly or indirectly by human activities. Therefore, UNFCCC distinguishes the climate change as a result of human activities in the atmospheric composition and climate variability due to natural causes.

Although there are still uncertain factors, most scientists consider it is necessary to take timely preventive measures. The international response to climate change is developed and formed gradually with the United Nations Framework Convention on Climate Change. UNFCCC set out its framework for action in 1992, seeking to stabilize atmospheric concentrations of greenhouse gases at a certain level in order to prevent the negative impact on climate system from human activities.

So far, UNFCCC has been received ratification, acceptance, support and altered documents from 185 countries. Besides, it successfully held meeting six times with the participation of all States Parties Conference of the Parties. Although the Parties have not reach a consensus and comprehensive measures on climate change, it has been widely accepted by the world that the global climate change will bring immeasurable loss and mankind would have to pay a huge price for the climate change. The study will become global environmental problems.