Environmental IssuesHard
Question
How many statements are correct ?
(a) Biomagnification is natural aging of a lake by nutrient enrichment of its water
(b) After CFC, methane is major cause of green house effect
(c) Ozone is secondary pollutant in troposphere
(d) Thickness of ozone is measured in Dobson unit
(a) Biomagnification is natural aging of a lake by nutrient enrichment of its water
(b) After CFC, methane is major cause of green house effect
(c) Ozone is secondary pollutant in troposphere
(d) Thickness of ozone is measured in Dobson unit
Options
A.a, b
B.only d
C.c, d
D.a, b, c