In the 21st century, the threat from acid deposition has actually been declining.

true or false?

The correct answer for the given statement above would be FALSE. It is NOT true that the threat from acid deposition has actually been declining in the 21st century. Acid deposition is described as a process whereby acid is trapped in the atmosphere and then falls out of the atmosphere in one of many forms acid rain being just one form. In the 21st-century, the threat from acid deposition has been steadily increasing get a booming industry throughout the world.

I'm pretty sure that's called a volcano