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| The most serious environmental problem. |
| The problem it can be said that is the most serious also in environmental destruction is a global
warming problem. It is fairly difficult to
solve, since this problem contains various
elements, such as ozone layer depletion and
deforestation, and its present situation
is also serious. Recently, it is being begun
in the world to cut down CO2 by the Kyoto
Protocol. Please have [ that it has been
a big problem and ] a look in the head also
in an environmental problem. |
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