infrastructure as a whole is probably one of the most important pieces of infrastructure los angeles has? >> l.a. would not work without hyperion. you can talk about our freeways, you can talk about our sunshine, you can talk about our airports, our transit system. literally l.a. would not work if we did not have hyperion. it's unappreciated engineering marvel. there it is. the smell. >> you like that smell? >> it is -- to me that is the smell of a city working. >> it's also the smell of the future, in a way. >> yes. to all of us. a majority of human beings for the first time live in cities. so many cities around the world. when i talk to my fellow mayors, they don't have this yet and need it. cities can't grow, cities can't work without these basics. and also what we're confronting with our environmental crisis globally isn't just about heating. it's about health. if you can't take care of sewage, disease spreads, pandemics can come about. this is as important for our human health as it is for the