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Posted by on Friday, July 2, 2010 at 8:37pm.

Air pollution often originates in one state or country but causes health and crop damage in other areas. For example, mercury from Midwestern power plants is harming plants, water, and health in eastern states. How should states, or countries, negotiate the cost of controlling these pollutants?

  • science - , Friday, July 2, 2010 at 8:39pm

    What do you think?

    We'll be glad to comment on your answer.

  • science - , Tuesday, January 24, 2012 at 4:56pm

    that is not the answer because the question is posted by tony on friday, july 2,2010 at 8:39 pm.

  • science - , Tuesday, January 24, 2012 at 4:57pm

    as we prepare this question because i don't know

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