Enviornmental Optimism:A Response to Enviornmental Pessimism

There alway exist pessimism and optimism in the research of future and protection of envirornment,but in practice,environmental pessimism leads a dorminant role.In fact,optimism,which is not accepted by people,provides us with valuable pointo of views which make us think and solue environmental problems correctly and scientifically in the development of economy and society.