one of the things we're trying to work on at the Scottish Wildlife Trust is lmaost a rewilding of cities. Trying to get people to think more about de-tarmaccing the whole front garden, for example.
I recently read Mark Cocker's book Our Place: Can We Save Britain’s Wildlife Before It Is Too Late?. It's a pretty dispiriting and depressing read on the loss of habitat and species in the UK over the past century, despite the British on the face of it being "nature lovers", evidenced by them being well into membership of the likes of the National Trust, RSPB, etc.
The one way out of the mess that he seems to be positive about is, extrapolating out that level of public interest, the opportunity offered by people turning their gardens over to wildlife. Removing the lawns and replacing it with flower meadow species. I hope he's right, but I have to say the anecdotal experience, as per WC's neighbour, makes me pessimistic.