It wasn’t important for people in medieval cities to have a working sewer. Nobody would invest in such a thing. But the benefits are obvious. It wasn’t clear t

It wasn’t important for people in medieval cities to have a working sewer. Nobody would invest in such a thing. But the benefits are obvious. It wasn’t clear to people that putting on a seatbelt saves their lives. Maybe, because there was no seatbelt in the first place. What’s important to people is sometimes a matter of marketing. What’s important to people requires that "the right stuff" is offered. People want to save the environment, but also want to save money. Only way this can work is if products get the damage they cause taxed in. Because right now, the environmentally friendly products are more expensive. It should be the other way around.