adj. causing or likely to cause harm; dangerous
Spilled oil is harmful to the environment.
Spilled oil is harmful to the environment.
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Who in 1943 published evidence explaining the harmful effects of eliminating fire from ponderosa pine forests?
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What is the harmful toxic substance spiders us to kill their prey?
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What can be planted in and around gardens to repel harmful insects?
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What kills harmful germs in the blood?
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What are materials that are harmful to the environment?
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The sun's rays contain harmful radiation.
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What was the most harmful type of fat?
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Which of the following was NOT a harmful action of all the bugs during the Dust Bowl?
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he ozone layer blocks some harmful rays which the sun emits.
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How are weevils harmful to us?
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A germ can be very harmful.
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What is the title of Rachel Carson's influential book about the harmful effects of chemicals on the environment?
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Sometimes harmful gas is invisible.
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bad; dangerous; unsafe; risky
helpful; beneficial
2 syllables
harm-ful
armful
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