I just don’t think any of this stuff has an impact on big environmental problems.
Times 7 billion people?
I'm (virtually) giving you the same look I give people who tell me their vote doesn't count, so they don't bother.
I think we need both. The more people do as individuals the more it will also motivate them to push for larger-scale actions. If politicians see it happening they will do their usual lead from behind, knowing they have support. Because it does need to become the socially acceptable thing. I am old enough to remember people smoking like mad and thinking nothing of driving after 4/5 drinks. Neither is really socially acceptable now.
Looking at people from a planetary viewpoint - the world's population has basically doubled since 1960 - so in less than my lifetime. That is like the penny doubling each day for a month - 1960 was day 30, we are day 31.
Those of us in developed countries are not that numerous, relatively speaking, but we use a lot of resources. Most people in undeveloped countries are super poor and don't use a lot of resources individually, but use a lot simply because there are so many of them. And of course they would like some of the "good life" that we have.
Some technologies have helped, because intermediate steps are skipped - when a villager can have an electric light and an inexpensive cell phone, run off a solar array on the roof, all the wires and power generation we used just are not needed. Better market gardening practices, better stoves to reduce fuel use, are all relatively easy to implement and make a big difference. Places like the Brace Research Institute help.