Agree a gazzillion percent!! On the plastic front, there’s some progress being made towards a UN plastics treaty which would legally bind countries to legal targets for plastic reduction. It’s not perfect at all, and it’s likely the US under Trump will ignore it, but would be a big win for plastic regulation (Green Peace and a bunch of other groups are campaining for its support- worth searching for local petitions if you’re interested)

Water reuse is a great idea. Although it’s worth pointing out that the UK looses 20% of it’s water to leakage before it reaches anyone[0]. Private water companies taking a basic amount of responsibility for maintaining their assets would do a lot before even talking about water reuse, rain harvesting etc.

[0] https://www.ofwat.gov.uk/leakage-in-the-water-industry/