What is exactly measured in Dobson units or DU?
A. The thickness of the ozone in a column of air from the ground to the top of the Atmosphere.
B. The noise level in the circumscribed area.
C. The amount of chlorofluorocarbons.
D. The hole in the ozone umbrella.
Answer:A
What is exactly measured in Dobson units or DU?
A. The thickness of the ozone in a column of air from the ground to the top of the Atmosphere. B. The noise level in the circumscribed area. C. The amount of chlorofluorocarbons. D. The hole in the ozone umbrella.