Q. Which gas is produced from animal dung?

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Q. Force of sea waves as they break against the coastline is known as

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Q. Renewable energy do not contribute to

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Q. Which energy source is expensive and used in small scales?

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Q. Which source of energy has benefited from the improvement in technology?

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Q. Which type of energy has high cost of research into new technology?

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Q. Heat from the light of the sun using solar panels and photovoltaic cells are known as

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Q. HEP stands for

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Q. Heat from the ground in a areas of volcanic activity is known as

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Q. Renewable energy do not contribute to air pollution and

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Q. Fast flowing water, such as from a waterfall is known as

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Q. Which source of energy is limited by the lack of suitable physical conditions?

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Q. PVs stands for

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Q. The least used source of energy is

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Q. What are the causes of carbobdioxide in the atmosphere?

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Q. How much percent of carbon dioxide is present in the atmosphere?

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Q. How the atmosphere is warmed at the surface of the earth?

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Q. Where the sun's rays reach on the surface on earth oblique angle?

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Q. The air is dry in

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Q. The atmosphere pressure decreases with

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