Question

how is burning of coal is harmful?

Answer 1

Hey mate here is your answer

Coal contains sulfur and other elements, including dangerous metals such as mercury, lead, and arsenic, that escape into the air when coal is burned. Burning coal also produces particulates that increase air pollution and health dangers. Burning coal emits large amounts of carbon dioxide into the atmosphere.

Hope this answer will help you!!

Answer 2

As it produce so much smoke because the particle get unburnt