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U5 W3 Vocabulary

Across
To give something in exchange for work or to make up for loss
Able to be replaced, not permanently used up
A material that is burned to release heat or produce power
An invisible gas that is formed by the burning of fossil fuels
Harmful substances that are put into the air, water, or soil
Down
Relating to a scientific test or trial
Sensible, realistic
A biofuel that is a renewable substitute for conventional diesel
The effect that one person, group, or event has on another