It's obviously a collective action problem and thus needs a collective solution. If I stop riding my car today, nothing changes. Would I be in favor of banning everyone, including myself from using any combustion engines by January 2020? Absolutely! Would it hurt? You bet! But it would be a incredibly reasonable trade off and we'd find new ways to cope. In fact anyone who lobbies for continued burning of fossil fuels should be charged with genocide.
Do you use electricity?
Do you own anything plastic?
What about metal?
I think you'll find if you ask yourself these questions you will find that the answer to your rhetorical question was within you all along!