单项选择题

The passage tells us that the future of the planet is dependent on all of the following EXCEPT

A．arresting the carbon dioxide buildup
B．protecting the ozone layer
C．restoring forests
D．conserving water
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单项选择题
What sort of problems are currently handled the way environmental problems should be handled
A．Geological.
B．Economical.
C．Political.
D．Environmental.
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