Originally Posted by
cyccommute
mine drainage and if you don't have knowledge of what's upstream, you can be ingesting several toxic metals that are natural as all get out but hardly good for you.
Further east you are going to run across water that may contain other chemicals that aren't good for you either and for which your filter is useless.
Sadly this is just what Rob is trying to make people aware of. We are ruining our planet. It wasn't long ago that there were pristine waters on earth. Now there are no open sources of water on the entire planet that are not contaminated, with the worst being toxic. I hope the next generation can find a better way.
BTW: Many of these other chemicals are from agriculture.