(n. ) Materials we can burn to make electricity, for example coal and oil.
(n.) A window in the roof to let light in.
(n.) The energy we use to make machines work.
_____ use energy from moving water to turn a big wheel to make flour.
_____ use heat from the sun to grow plants in cold countries.
The greenhouse____.
Fossil fuels can_____.
What is it?
What is it?
What is it?
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