NEET2012BotanyEnvironmental IssuesActual
Which one of the following is a wrong statement?
Options
- AMost of the forests have been lost in tropical areas
- BOzone in upper part of atmosphere is harmful to animals
- CGreenhouse effect is a natural phenomenon
- DEutrophication is a natural phenomenon in freshwater bodies
Correct answer
B. Ozone in upper part of atmosphere is harmful to animals
Step-by-step solution
Ozone ( O ₃ ) is an isotope of oxygen which exists in so called ozone layer at a height of about 15-60 ~km in the middle and upper stratosphere and lower mesosphere. This ozone layer absorbs UV-rays of longer wavelength and protects life on Earth from damaging effects of these radiations. Ozone in the lower atmosphere (troposphere) is regarded as a pollutant.