Improvements upon math education, ultrasound technology, and construction technology all sound like very reasonable, practical goals. Perhaps the most radical goal is gene therapy, but also the most exciting and sci-fi.
Isn't it a bit odd to present a chart that shows buildings to be the least-important component of the problem, and then go on to talk about only that small component? Especially saying "Buildings are a surprisingly large source of emissions" when the graphic just above that sentence shows that buildings are not.