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Question generated: Which human activity is most harmful to the natural environment?

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Question generated: Vehicle exhaust contains a form of pollution called particulate matter. Technologies are being developed to reduce the amount of particulate matter in exhaust. A vehicle that produces less particulate matter would have the greatest impact on which aspect of human health?

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Question generated: Which adaptation will warn predators not to eat an animal?

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Question generated:
Paleontologists are scientists who study evidence of past life on Earth. Which method do paleontologists most likely use to determine the forms of life that existed millions of years ago?