The hole in the ozone layer is now repairing due to international regulation of CFCs
Acid rain is no longer a problem because of regulation of sulfur dioxide emissions
Leaded gasoline has now been banned in every country
Asbestos exposure is rare now due to regulatory controls. It's bad that it took so long to get done.
Government regulation is effective in protecting people from health risks.
Collective action (e.g. through voting) is effective in establishing such regulation.
If you spread the lie that voting in favor of such policies (and politicians who support them) is a useless waste of time, you are spreading industry propaganda.
Effective, large-scale change is IN FACT at the polls.
It is nowhere else.