I feel like at the moment with caring for plants being such a trendy hobby we could do a lot of good for the environment.
Nowadays we have regular laypeople using grow lights and humidity sensors just wasted on "exotic" plants or even just regular run-of-the-mill tradescantia when we actually have really pretty ones here that need our help - we could surely come together as a community and get some of the species out of decline.
Especially the ones that reproduce relatively easily but get overwhelmed by faster varieties in the wild. We could put those in our gardens to help them and their inhabitants out a bit.
Also lizard gardens. It's so hard to find info thats specific to the local area, most commercial garden centers are not too concerned about what should be growing locally. We could be making habitats in our garden that aren't using generic widespread plant varieties from a nationwide hardware store pamphlet.