In the 21st century,
the countries of the world will either find a way to drastically reduce global carbon emissions, or it will likely face unprecedented environmental problems in relation to global warming. A. the countries of the world
will either find a way to drastically reduce global carbon emissions,
or it will face unprecedented environmental problems in relation to global warming
Parallelism error. It shall be will either find.....or face.... B. the countries of the world
will either find a way to drastically reduce global carbon emissions,
or they will face unprecedented environmental problems relating to global warming
Same as A C. either the countries of the world will find a way to drastically reduce global carbon emission, or
it will face unprecedented environmental problems relating to global warming
it does not have proper antecedent D.
either the countries of the world will find a way to drastically reduce global carbon emission
or face unprecedented environmental problems in relation to global warming
No subject after or E. the countries of the world will either find a way to drastically reduce global carbon emissions or face unprecedented environmental problems relating to global warming
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