Environmental Science
An important reason for the large daily temperature range over deserts is:

The light-colored sand radiates heat very rapidly at night
Dry air is a very poor heat conductor
Free convection cells are unable to form above the hot desert ground
There is little water vapor in the air to absorb and re-radiate infrared radiation
The ozone content of desert air is very low

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Environmental Science
MoEF means

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

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