3 Read the text again. Match the words in the box with the definitions.
sustainable energy renewable energy
alternative energy fossil fuels biofuel
1 ... comes from sources that do not damage the
environment.
2. comes from sources that do not run out.
3
gives us energy without affecting the supply
in the future.
comes from material like plants.
5 ... are formed over millions of years from the
remains of plants and animals.
​

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