As a movement, it's still in its infancy. You can checkout the SLRPNK.net Lemmy instance for various communities focused on real-life impact including:

!community_community@slrpnk.net

!foraging@slprnk.net

!inperson@slrpnk.net

!vegan@slrpnk.net

!farming@slrpnk.net

!zerowaste@slrpnk.net

!selfhosting@slrpnk.net

!hydroponics@slrpnk.net

!zines@slrpnk.net

!writing@slrpnk.net

!offgrid@slrpnk.net

!anticonsumption@slrpnk.net

!composting@slrpnk.net

!climate_action_individual@slrpnk.net

!fixing@slrpnk.net

!grasweeti@slrpnk.net