I would like to help but history is not my strong point
It might be due to crimes, propaganda and dealing with drugs. Check on websites for the evidence hope this helped.
I've heard the Ganges River is very polluted and filthy. Indians throw trash in there. It was known for its beauty. People bathed in its waters believing it was holy. That is one reason it is so dirty. It would take a very long time considering the fact that the Ganges River is one of the longest in India, with the Indus River at first place.
The Gold Rush populated areas with people that were not practicing slavery
The answer is the corrupt bargain I hope this helps you!
