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So far, research suggests that zero-emissions vehicles are not a sensible solution to the problem of steadily increasing air pollution.
a. So far, research suggests that zero-emissions vehicles are not a sensible solution to the problem of steadily increasing air pollution.
b. Because air pollution is of serious concern to many people today, several US government agencies have implemented plans to begin solving the problem.
which one is better thesis for a short paper? what is the problem with the other one?