___________ energy sources pollute the environment.
Non-conventional
Conventional
Renewable
Non-commercial
_______ is the essential component in Natural gas.
Ethane
Propane
Methane
Methanol
________ is the most cleanest and most abundant renewable energy source.
Solar energy
Wind energy
Biomass energy
Nuclear energy
What are the factors that affect the wind pattern on earth surface?
Uneven heating of atmosphere by sun
Variations on Earth surface
Both options given above
None of the above options
______ is a common nuclear fuel.
Hydrogen
Helium
Uranium
Lead
__________ is used to generate hydroelectric power.
Static water
Flowing water
Tides
Waves
Coal is a fossil fuel formed from _________.
dead animals
vegetation
gases
minerals
Largest dam in the world, Three gorges dam, is situated across the ___________.
Amazon river
Brahmaputhra river
Yangtse river
Mississippi river
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