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

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

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Environmental Science
MoEF means

Management of Environment and Forestry
Ministry of Forest and Energy
Ministry of Fuel and Energy
Ministry of Environment and Forests

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Environmental Science
Which of the following regarding ecological pyramids is not correct?

In deep water ecosystem, the pyramid of biomass is upright
In most ecosystems, the pyramid of numbers and biomass are up right
In tree dominated ecosystem the pyramid of numbers is inverted
The pyramid of energy expresses mainly the rate of food production
The total energy flow at successive tropical level always decreases

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