Civil Services Uttar Pradesh (उत्तर प्रदेश) PCS Mock Test Series 2025 General Knowledge Ecology and Environment Environment Problems
What are the harmful effects of nanoparticles on the environment?
1. They can accumulate in the environment and contaminate water and soil.
2. They can deplete the ozone layer.
3. They can enter the food chains.
4. Dust cloud formation.
Select the correct answer by using the codes given below.
1
1 and 4 only
2
2, 3 and 4 only
3
1, 2 and 3 only
4
1, 2, 3 and 4 only