# Environmental Issues

Subject matter experts of JagranJosh have developed chapter wise practice questions of Class 12th as per the relevancy of the chapter in the CBSE board exam. This practice set contains 15 questions with detailed explanations on “Chapter: Environmental Issues” of Biology.

• Q8.One of the following is not a greenhouse gas:

• Q9.Pollution by Fluoride principally affects:

• Q10.The nation that contributes most to ozone layer depletion is:

• Q11.The process of eutrophication causes:

• Q12.The largest amount of methane is released from: