Environmental crisis leads to one of the serious problems, namely, water shortage. Presently, more than 40% of the world’s population, more than 2 billion people, now face water shortage. It is predicted hat with the global population expected to increase from six billion to eight billion over the next 25 years, more pressure on environmental protection stress is expected.//

As a developing country, china is confronted with the dual task of developing the economy and protecting the environment. Proceeding from its national conditions, china has, in the process of promoting its overall modernization program, made environmental protection one of its basic state policies.//

It is known to all that protection of the ecological environment and biodiversity is the focal point of environmental protection work. China is rich in wildlife species. There are about 6,000 vertebrates alone and 30,000 species of higher plants.//

The issue of climate change calls for common and active responses from the international community, as it concerns the well-being of all peoples and the global sustainable development.//

China, with complex climatic conditions, fragile ecological environment and frequent natural disasters, is vulnerable to climate change. Climate change is the common challenge faced by the mankind. As the largest developing country in the world, China faces enormous tasks in developing its economy, eradicating poverty and improving people's livelihood, but it still attaches great importance to climate change. //