Mathieu,
With regard to urban biodiversity,
https://forum.inaturalist.org/t/inaturalist-as-a-tool-for-urbanism/54502
I was at an urban ecology workshop in Calgary yesterday. The city mostly cares about pest management: beavers, coyotes, and geese.
It seems like Montreal (and surrounding districts like Beloeil) are a doing a lot more. That’s great!