Based on data of haze days observed by Puyang Meteorological Station of Henan Province from 1971 to 2012,climatic characteristics,causes and prevention counterm
Climate change will lead to a variety of climate disasters,and climate disasters have a greater impact on China's food production. Weather index insurance i
Present situation and problems of international shipping professionals in China were analyzed,and then some countermeasures and suggestions were put forward to i
At present,peoples environmental awareness gradually enhances,and the environmental requirements on production and living continuously improve.Urban sewage di
Urban sewage treatment facility is an important ways to control polluted domestic water. The operation of urban sewage treatment facilities is good or not, and
Based on the monitoring data of water quality of more than 40 centralized drinking water sources in 40 towns( townships or streets) of Kaixian County in the fir