How can scientific conclusions be reliable, but also able to be changed with the introduction of new evidence

scientific conclusions are reliable as they are helpful for many things however it is true that after the evolution of new ideas the old theory have some changes or may change fully or may be proved wrong but yeah the old theories are still helpful for many reasons and things.

so I think scientific conclusions are reliable

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

the answer is c a tornado