Turn off all your lights, at 8:00 local tomorrow, for an hour.
Sydney allegedly saved 48,000 cars worth of shit to breathe in that hour.
Easy, fun, and if it did in fact go viral, the Great Tube of Infotainment would grab it, because it would have good visuals, and our pundocracy would draw all sorts of Profound Conclusions About The Meaning of it All.
Some of that meaning would no doubt be how communications have changed these days. And things that are important to people.