Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

None of these
Photochemical oxidation of organic matter
Volcanic eruptions and lightening discharges
Biological decay of vegetable matter

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Environmental Engineering in CE
Which of the following is not a practical method of low level radioactive waste disposal?

Discharging to atmosphere through tall stacks after dilution
Disposing off in rivers & oceans
Filling in steel crates and shooting it off out of earth
Dilution with inert material

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