Large scale polluters love Earth Day. It's a big advertising day for them. Coca Cola will spend a lot of money today telling you to recycle one bottle, because they don't want anything to happen, any law or tax or regulation, that keeps them from making another billion bottles next year.
A version of the Spider-Man maxim holds here. Responsibility scales with power, and on both sides of the equation, yours is limited. I know that's not the sexiest idea, but it has the advantage of being true.
Some people in The Comments seem to be misunderstanding my point to be that individual actions don't matter. That's not what I'm saying at all. I'm saying that actions which influence and restrain institutions are the only ones that matter on the scale of institutions, which is the actual scale of the problem.
Your neighbor throwing out a bottle is unfortunate, but every ounce of effort you expend on being mad at them, rather than the company that made a billion bottles last year, is wasted.