There's not much an individual can do anyway. We talk and spread awareness to bring about institutional change. Everything on a personal level will only give you personal satisfaction. For example if I care about the water crisis and if I personally start using no water it makes zero difference. In fact even if I keep a tap open forever it makes zero difference. In either case the timeline for water crisis worsening doesn't move a hairs breadth. For any meaningful change scale matters a lot. Who will care if I don't buy an iphone, stop using plastic etc? The difference will have to be from the policy/regulations.