1、ecosystem is a region in which the organisms and the physical environment form a (an) ________________ unit. a、harmonized b、interacting c、symbiotic d、physical
2、wilderness is the area with________________ human influence. a、many b、maximal c、much d、minimal
3、environmental science is an(a)________________ field that includes both scientific and social aspects of human impact on the world. a、independent b、interdisciplinary c、traditional d、important
4、environmental issues do not necessarily coincide with artificial political boundaries.
5、environment is everything that affects an organism during its lifetime.
6、environmental science is an interrelated area of study that includes both applied and theoretical aspects of human impact on the world.
7、many environmental problems have become global in nature.
8、sustainable development is development to meet the present needs without sacrificing the needs of future generations.