Environmental Science
Low clouds retard surface cooling at night better than clear skies because:

The clouds are better conductors of heat than is the clear night air
The formation of the clouds releases latent heat energy
The water droplets in the clouds reflect infrared energy back to earth
The clouds start convection currents between them
The clouds absorb and radiate infrared energy back to earth

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP