R134a（HFC） is greenhouse gas, Europe and the United States countries have enacted laws to restrict the use of R134a in vehicle air-conditioners. We were told that the CO2 system of the vehicle air-conditioners would be equipped in 2001. Now eight years pasted, we can not buy the new car which has been equipped the CO2 system of the vehicle air-conditioners. You only can buy the car without the air-conditioners in Europe in 2011. 
We know that the R134a emission of the vehicle air-conditioners lifetime is equivalent to 10141kg CO2. Every year in china R134a emission of the total vehicle air-conditioners is equivalent to 0.04 billion tons CO2. Last year in china the total emission  阅读全文>>