环境科学-交叉关系学科-课后题答案-第一章
5页1、环境学概论第一周作业环境学概论第一周作业1.Environmental problems are complex and interrelated.Within the ecosystem every component seems to be interconnected and interacted with each other as illustrated in the Darwins theory of the relation between the production of seeds in red clover and numbers of catsEnvironmental problems often involve social, ethical, political and economic issues. Its not easy to achieve acceptable solutions to environmental issues; an environmental decision that is supportable from an econ
2、omic point of view may not be plausible from the political perspective. As the reintroduction of wolves into Yellowstone manifested, the solution has an ethical side and influence not only natural but also economic and social realms. Whats more, environmental problems do not necessarily coincide with political boundaries, thus require the collaboration of multiple states or even nations.Its gettin more complicated as the globalization accelerates and the scale of environmental problems expands a
3、nd requires better governance to ensure sustainable developments.2. The ecosystem approach is the comprehensive and integrated management of human activities, based on the scientific knowledge about ecosystem and its dynamics, and achieve sustainable use of ecosystem goods and services and maintenance of ecosystem integrity.It is the right approach because an ecosystem involves not only all organisms but also the abiotic environment, and they form a complex network of interrelationships. Only by
4、 thinking systematically, can we understand the dynamics of the ecosystem and take the right action which satisfies human needs while preserving health of the ecosystem.3. The security consists of economic, political, cultural, social and environmental aspects. Urbanization and human migration can put great pressure on environment, leading to land degradation and eutrophication, which destroyed the aquatic ecosystem. These would affect the economic and environmental security. The environmental c
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