Earth

Which of these types of pollution occurs naturally?

More Questions from Earth
Which of the following is not a major component of an ecosystem?
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What type of scientist studies microscopic plants and animals?
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Earth's crust is made of many pieces called ______ plates.
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What is the highest mountain, considering just the contiguous United States?
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Where was the lowest world temperature, -128.6 degrees?
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In the United States, summer officially begins in which month?
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Where is most of the earth's gold located?
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Which of these is the first step in the making of a fossil?
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