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Biology 7 Online
OpenStudy (anonymous):

Review the following list and select either an "H" if the item is a hazard, a "B" if it's a benefit, or "HB" if it can be both a hazard and a benefit. pyroclastic flows volcanic ash geothermal energy lahars lava flows volcanic materials (pumice, lava rock)

OpenStudy (jazilove):

pyroclastic flows-H volcanic ash- HB geothermal energy- B lahar- H lava flows- H volcanic materials (prumice, lava rock- B

OpenStudy (anonymous):

@JaziLove is right

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