The leakage of which of the following gases caused the Bhopal Gas Tragedy in 1984?

Which one of the following is related to global dimming?

Which one of the following is the main reason of acid rains?

Ozone layer of upper atmosphere is being destroyed by which of the following?

Which one of the following statements is true with regard to a greenhouse?

Which of the following pairs (Disease - Pollution) is not correctly matched?