Environmental Science
In ecological succession from pioneer to climax community, the biomass shall

increase continuously
decrease
increase and then decrease
no relation

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Environmental Science
The atmospheric greenhouse effect is produced mainly by the:

Absorption and re-emission of ultraviolet radiation by the atmosphere
Absorption and re-emission of visible light by the atmosphere
Absorption and re-emission of visible light by clouds
Absorption and re-emission of infrared radiation by the atmosphere
Absorption and re-emission of visible light by the ground

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