This is a very important point.
It makes me think of a smaller scale example I witnessed as a cashier. I saw cashiers throwing away plastic bags by the hundred regularly, because they failed to load them onto the holding racks (you've seen them, but probably paid little attention to them) properly and it was simply easier to toss dozens of bags in the trash and load a full package of bags.
Meanwhile, at home my mom rebuked me for throwing one used and damaged bag in the trash instead of recycling.
I feel like we all can help with rising sea levels by filling a jar with sea water and keeping it in our house. That's a little less water in the seas. I'm helping.
Instead of hoping 7 billion people change their habits, we should change the habits of a few hundred companies. Everyone will pay the price somehow, but companies are vehicles of large scale change, and our markets can efficiently make the changes if we shape them correctly.