Question

In exploration of minerals, two main methods are used; open mining and underground mining. In relation to these methods which of the following statement is true?
1)Impact of underground mining on environment is more than open mining.
2)Impact of underground mining on environment is less than open mining.
3)Impact of mining on environment is less than the underground mining.
4)Underground mining has no impact on environment.

Answer 1

Answer: impact of open mining is more on environment.

Explanation: underground mines are done with utmost precautions, so only post mining subsidence is major imapct. But open mining causes major impact on ecology, atmosphere, hydrosphere and lithosphere.