Ozone layer depletion was not noticed until 1979, while CFC’s have been around since 1920s because CFCs take time to enter the stratosphere and remain there for at least 60 years after their initial release.
Option: A
Explanation:
Ozone layer is found in stratosphere. Ozone plays a dual role in the environment. When it is in the ground surface zone it is a harmful gas but when its in the atmosphere it is a life saving layer which absorbs UV rays and protect human beings and animals from the harmful affect of poisonous gases.
Though ozone layer started depleting from 1920. But it came into notice from 1979 as CFCs take time to enter the stratosphere and remain there for at least 60 years after their initial release.
C. The study of unique traits of different parts of the world
Answer:
(2)
Explanation:
cuz it has the largest intervals:)
The crash of indian 24 its easy
The planet that has one satellite base on the recent discovery would have been pluto which is classified as a dwarf planet because of its small in size and its capacity. In the correct order after the sun, it takes place as the 9th planet.
