Correct answer: False
Mining has both long term and short term effect on the earth. It totally depends on the type of mining and where the mining is done. Some non-fuel material mining does not cause any harm to the environment.
But the extraction and mining of metal and minerals release lots of toxic substances. If these substances leak into the environment it can cause great harm to the plants and animals living there in that ecosystem and it may last forever.
Hence, the correct answer would be false. It may have short term effect and long term effect.