Tag: commercial applications

The processes for which any CO2 is not evolved is :

• all the forms of nuclear energy,

• hydroelectricity (though dam reservoirs in the tropics might free a little methane, which is a greenhouse gas, because of the decaying of biological debris in the water),

• sun rays,

• wind,

• tidal energy,

• geothermal energy,

• biomass if replanted.
• So the correct option is C.

Hydropower is a renewable, non-polluting and environmentally benign source of energy. Sardar Sarovar dam uses hyropower to produce electricity.

Energy obtained by using wind, tides, solar etc. in renewable energy, also called non-conventional energy, solar energy is inexhaustible source of energy.

Fuel gas, coal, petroleum, cannot be replenished back once they are finished, they are non-renewable sources, while forest if tried can be obtained back.

Renewable products can be obtained back once finished, products from agricultural activities can be considered as a renewable product.

• Renewable energy is energy generated from natural resources —such as sunlight, wind, rain, tides, trees and geothermal heat—which are renewable (naturally replenished).
• Trees are very important for us as a renewable resource. Trees are a natural resource that can be renewed by planting of trees and replacing the trees that are harvested for use by people.
  
• Hence the Best source of renewable energy is trees.
• So, the correct answer is 'Trees'.

Renewable source of energy is a type of resource which can be replenished back easily. Coal, petroleum, kerosene will take millions of years to replenish back so, they are non-renewable source of energy.