Pardon? Factories have caused all sorts of problems with discharge, intentional or unintentional. Here's some from the top of my head:
https://en.wikipedia.org/wiki/Bhopal_disaster (mismanagement at a pesticide factory causes an explosion, poisoning many people and permanently contaminating the surrounding landscape).
https://en.wikipedia.org/wiki/Minamata_disease (a factory discharged mercury into the sea for years, where it interacted with anaerobic bacteria in the sediment to become incredibly deadly organic mercury and poisoned an entire town)
Keep in mind, these are from the top of my head and I am a nonexpert; we have environmental regulations because people have been hurt or killed by pollution numerous times.
Here's a quote that I hope will emphasize just how powerful pollution can be on an industrial scale:
> Pollution was so heavy at the mouth of the wastewater canal, a figure of 2 kg of mercury per ton of sediment was measured: a level that would be economically viable to mine. Indeed, Chisso did later set up a subsidiary to reclaim and sell the mercury recovered from the sludge.
They literally dumped enough mercury into the river to turn it into a mercury mine. If that doesn't convince you that factories haven't simply been operating with "nothing going wrong", then I don't know what to say.
https://history.com/news/epa-earth-day-cleveland-cuyahoga-ri...
I think climate change works better anyway, as global warming caused other changes, not just a rise in average temperatures
If the general public needs to be convinced of a project to save the planet climate change is not good messaging!
But a direct scientific link to ... well, almost all of those fears is totally acceptable because we love our cars?
The world... is insane.
Climate change (because people were too stupid to use the phrase "global warming" without making fun of the "warming" part whenever it was remotely cold) encapsulates the need for people to care about pollution with the understanding that it may be future generations will reap the benefits in a way that "reduce pollution" does not.