Source for 1. above https://www.nytimes.com/interactive/2016/05/19/upshot/forty-percent-of-manhattans-buildings-could-not-be-built-today.html https://www.nytim

Source for 1. above https://www.nytimes.com/interactive/2016/05/19/upshot/forty-percent-of-manhattans-buildings-could-not-be-built-today.html https://www.nytimes.com/interactive/2016/05/19/upshot/forty-...