That is correct. Water is more important to life than gold.
There are ways to mine that do not destroy the environment. The use of mercury or chemicals is very hazardous to the environment, no matter how safely they are handled. Doing it right, cost more and takes more time.
Full disclosure: I am a gold prospector using gravity to prospect for gold. Using the tools nature provides is slower but rewarding. Gold prospectors using this method remove lead, mercury, and other heavy metals from streams and rivers.
Have a great week!
Steem on,
Mike