Biology, asked by mandeepkaur7851, 7 days ago

How many statements are correct ?
a. Biomagnification is the natural ageing of a lake by nutrient enrichment of its water
b. After CFC, methane is a major cause of greenhouse effect
c. Ozone is a secondary pollutant in troposphere
d. The thickness of the ozone is measured in Dobson unit

Answers

Answered by gurubakshmahto467

0

Answer:

b c d statement sre correct

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