I didn't see the actual mines in Gabon, but you would pass beautiful clear streams, and then a few km down the road, cross a bridge over water that was absolutely golden, with heavy sediment and no clarity. There were fish, but not many.
I found the gold colour ironic.
It's very easy to blame Chinese business, but Canadian, European and American outfits - really businesses that belong to no nation - are right in there with them.
At one point, we found a meandering stream that was shallow enough to walk across in hip waders. We were getting our gear out when some older men and women arrived, and told us there were no fish anymore. There was a palm oil plantation up the road, and the river was full of pesticides from it. The stream had been the village's water supply, and they had to walk a distance to safe water. They wouldn't even do laundry in it.
If you guys could see it - it looked like a perfect savannah stream.