a second point, just like i was saying, glaeser and khan letting people live in temperate cities. is green if you were a real environmentalist, care about the planet, you would want to go and make it super to build a ton of housing right in california what's going on, right now is parochial environmentalism. like, i don't want the planet harmed right next. me it's like it's planet. so that doesn't make any sense. all right. and then just ripping off bernanke seagen, who i think kato published some of the stuff back in the seventies, he wrote the classic study of land use in houston. and here's what he said. while people get really about urban pig farms ruining, the neighborhood, that kind of thing, market forces lead to a natural separation of uses, even when it is legal to go and build things next to other things where people wouldn't want them. it rarely happens. there's a reason why most manufac turing is right next to harbors and train stations. that's because you want to get low transportation. there's a reason why most commercial construction is on main roads because you wan