Final answer:
The word renewable means being able to be used more than once, especially in the context of energy sources that do not harm the environment.
Step-by-step explanation:
The word renewable means that something is able to be used more than once. In the context of the given sentences, it refers to forms of energy that can be replenished naturally and do not harm the environment. Renewable fuels are an example of this, as they are not consumed when producing energy and can be used again.
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