Human society has different environmental problems in different historical periodicities and countries，so，The key point to protect the environment is different in different times and countries. The people is acquainted with implication of protecting environment based on the relationship that developing unity of opposites about environment，thinking protecting environment is not only to control pollution ，but also to develop resources legitimately .besides,Economic development can not exceed environmental boundary exposure limit .
The Phenomenon of climate variations arised in all over the world ，especially in recent years，this kind of phenomenon become more evident. The evolution and formation for climate is a complex problem . It is hard to make sure the cause of formation ,and what actully happened about it , including natural reason ,human activities ,and calculating the tendency of changing climate. 花了我壹個小時，如果有更好的可以改動，不謝。