If all the plants and trees vanish from the earth, the gases which will decreases is:

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Q: 87 (RAS/2012)
If all the plants and trees vanish from the earth, the gases which will decreases is:

question_subject: 

Science

question_exam: 

RAS

stats: 

0,18,4,2,1,1,18

keywords: 

{'gases': [0, 0, 5, 12], 'plants': [11, 0, 4, 4], 'trees': [1, 0, 0, 0], 'caron dioxide': [0, 0, 0, 1], 'nitrogen': [1, 1, 0, 2], 'oxygen': [3, 0, 1, 0], 'earth': [0, 1, 1, 1], 'water vapour': [0, 0, 1, 2]}