The world, as a whole, ignores them.

　　One would hope, however, that governments, perhaps through a strengthened U.N., could somehow be forced to realize that when the Earth reaches the critical mass of pollution, it may be too late to do anything about it.

　　That would be a common tragedy indeed.

　　评价

　　This excellent response displays an in-depth analysis of the issue and superior facility with language.

　　While acknowledging that environmental problems are serious and of global dimensions, the essay explores the complexity of international cooperation.

　　Such cooperation, the essay argues, runs into a variety of problems, and the writer offers persuasive examples to support that point:

　　-- the unwillingness of nations to interfere with other nations through political measures such as restriction of foreign aid

　　-- inadequate environmental regulations, which are caused both by the differential impact of polluting activities between countries and regions and by the difficulty of comparing the long-term effects of polluting actitivities with the more easily documented, short-term costs of reducing pollution.

　　The essay distinguishes itself in part by its excellent organization.

　　The first paragraph analyzes the claim and announces the writers position; the second and third paragraphs provide clear examples supporting that position.

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