6. Fill in the blanks using suitable words given in the brackets.
(polluted/ pollutants) by the human activities.
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Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.
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Answer:
polluted by the human activities
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