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Which of the following is true about land vegetation 20,000 years ago compared to today?

 

 

 

Most regions on Earth were wetter and more vegetated.

 

 

Rain forests in the tropics were more extensive.

 

 

Total land vegetation was reduced by about 25%.

 

 

Vegetation on land contained more organic carbon.

 

 

None of the answers is correct.

 
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