Consider the following:
1. Oxides of Carbon
2. Oxides of Sulphur
3. Mercury
4. Radioactive material
Which among the above is / are released in the environment when coal is burnt?

Answer: [D] 1, 2, 3 & 4

All the options are correct in this question. Coal is considered to be the worst environmental pollutant when burnt because of its sulphur content and traces of mercury and radioactive material.

This question is a part of GKToday's Integrated IAS General Studies Module