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Which of the following option gives a correct statement of Dobson Unit (DU).

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Which of the following option gives a correct statement

of Dobson Unit (DU).

1 DU = 2.69 x 10²⁰ CFC molecules / m²air column

❌

1 DU corresponds to about 2.69 x 10²⁰

CO

₂ molecules / m²air column

❌

If vertical column of Ozone is brought to

surface atmosphere at 0

^OC, then its thickness will give the DU.

✅

DU is a measure of GWGs (Global Warming gases) at 0 ^O

C

based on the thickness

❌

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