Prof. Christophe Reinhardt runs the MIT Sustainable Design Lab. On Nov. 25, 2019 he gave a very interesting presentation, including talk and slides, that shows a pathway to make more housing, all kinds of housing, and greater housing density both more palatable in Arlington, and actually desirable. He also stressed the importance of paying attention to housing now in order to meet the climate change challenge. Charts (starting about 10 min in) show how drastically we need to reduce our carbon footprint to reach net zero by 2050. Buildings today account for about 40% of our carbon emissions world wide. What we build today will likely be around through 2050.