Solar energy is:

Wind energy is:

Biofuels are:

Geothermal energy is

Alternative ---------------resources can be used to produce electricity. What fits in the blank?

-----------------------are non-renewable energy sources that must be conserved. What fits in the blank?; ; ;

The energy from the sun is most likely used for –

All of the following are classified as alternative energy sources EXCEPT-

Biofuels can be made from which of the following –

Almost all energy on earth originates from –

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