Answer:
only 3
(D) <em>option</em><em> </em><em>is </em><em>right</em>
Answer:
Natural air pollutants include radon, fog and mist, ozone, ash, soot, salt spray, and volcanic and combustion gases.
Answer: 2.6 x 10^13 m/day
Work:
There’s 86,490 sec per day, so
(3.0 x 10^8 m/s)(86,400 s/1 day) = 2.6 x 10^13 m/day