Are they prepared for the sacrifice?
I ask this as the throwing away of plastic / oil economy isn't easy when you look at science and healthcare and advances made.
I agree something has to be done, making small changes in our lives will make small changes bigger.
Convincing people they need to go back on time (when judged by economic and health and "owning stuff" metrics) is a hard ask. And will easily set up a them and us. Unless we completely overthrow the right wing capitalist groove machine while keeping the things we've got accustomed to. Like not dying early.