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Some sources of particulate matter are

a. vehicle exhaust, burning waste, fires, and tobacco smoke.
b. coal mining, manufacturing, and agriculture.
c. acid rain, nuclear energy, water, and dust.
d. natural metals found in rocks and soil.

User Sjh
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1 Answer

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Answer:

d. natural metals found in rocks and soil.

Step-by-step explanation:

User Dhevendhiran M
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