for - sustainable building - super insulator - sustainable building - affordable aerogel insulator - from - youtube - aerogel - question - how circular is the Fraunhofer aerogel production technique?

from - youtube - aerogel - Fraunhofer Institute - https://hyp.is/_JmJGhU4Ee-0tnt7qAHc_w/docdrop.org/video/llKF0a0bnhk/