Humans have greatly increased the level of in the atmosphere

Carbon dioxide.

Explanation:

There is a significant increase of carbon dioxide in the atmosphere due to the human impact.

There is a significant increase in the level of carbon dioxide when compared to previous decades.

This is due to increase in the number of vehicles on road, more industrial setup, more carbon emissions due to commercial equipment.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

answer: c

explanation: