Which of the following is a balanced fertiliser for plants? (UPSC Prelims/1979)
Q. Which of the following is a balanced fertiliser for plants? (a) Urea (b) Ammonia sulphate (c) Nitrates (d) Compost […]
UPSC Environment
UPSC Environment
UPSC Environment
The most common substance responsible for pollution is UPSC Prelims/1979)
Q. The most common substance responsible for pollution is (a) Smoke (b) Carbon dioxide (c) Sulphur dioxide (d) Carbon monoxide