【正确答案】In recent years China's economy grows very fast. However, its pollution and emission problems are also surprising. China is already the biggest country of carbon dioxide despite the fact that its economic scale is only about a half of the US. Coal is the chief offender of pollution that leads to the crisis. China consumes about two-fifths of the world's coal at a growth rate of about 10 percent a year. In order to tackle the problem, Chinese government starts a low-carbon action which will foster its future growth, development and energy security objectives. The government has also set an ambitious goal for using renewable energy, hoping that by 2020 about 20 percent of electricity needs will be met by wind and solar power.