Challenger App

No.1 PSC Learning App

1M+ Downloads
The first hole in ozone layer was detected in ?

A1980

B1985

C1990

DNone of the above

Answer:

B. 1985


Related Questions:

Minamata disease was first reported in?
As a general definition we can say that photochemical smog occurs when _____________ and ___________ react to sunlight.
What is an undesirable change in physical, chemical, or biological characteristics of air, land, water, or soil due to the introduction of contaminants called?
How does eutrophication contribute to the aging of a lake?
When does the rate of aerobic oxidation reduced in the sewage that is reduced to the water?