changing architecture is an underrated tactic against climate change and general side effects of human expansion, here are some ideas i collected to modify our towns to be more wildlife and climate friendly,
not just gardens on rooftops but things like putting solar panels on buildings instead of on new land, bee/bird baths in local parks and gardens, not building over old growth forests or historical breeding grounds, using sustainable and recycled materials like these:
installing low flow and energy efficient appliances, solar panels over parking lots to create shade and maximize space efficiency (yes car dependency is awful and massive parking lots shouldnt exist, but this can apply to smaller ones still and car dependency is a wide issue in NA which wont be fixed overnight and this is an idea in the meantime)
incorporating native species of grass, bushes, flowers and trees in landscaping for buildings, local parks and gardens, adding under/over passes to places with lots of roads for animals or even green bridges,
building techniques that create energy efficiency, things like good insulation and changing orientation for the most natural heating and light (https://fontanarchitecture.com/sustainable-house-design-21-ideas/ this article goes into it better than i can since im not an architect or engineer)
planting lots of trees around streets and sidewalks to reduce the urban heat effect, using long lasting materials in buildings, making recycle/green bin sheds to stop wildlife foraging through trash for food,
green corridors in cities (short from Sam Bentleys amazing channel, on how its being used in colombia: https://www.youtube.com/shorts/nNzndT_yKzs) use less glass/reflective materials on buildings to reduce bird collisions, or putting patterns/ external screens on these surfaces, at home you can add stickers on your windows or use frosted/one way glass, reducing artificial nighttime lights for local insects, only using light when/where needed and using dim, warm lighting and energy efficient lights like LEDs,
i understand some of these are very costly like using recycled materials and they may be hard to implement broadly, but hopefully ideas like these get considered and implemented more in cities and towns for the benefits to both humans and animals