Here’s the the wrap on silk: silk is the goods provided insect death doesn't upset you, and if it does, there are cruelty-free silk options available. Pure silk is completely biodegradable and comes with significantly lower environmental taxes than other textiles, requiring very low chemical and energy inputs. Most of the world’s silk is made in India, China and Southeast Asia, where the domesticated silkworm has been bred in captivity long enough that it evolves into a blind moth that cannot eat. As such, it survives only 4-5 days during which it lays eggs. Ethical issues aside, the process of weaving silk has very low environmental effects insofar as disease prevention, sustenance for insects/larvae and energy intensity of weaving into fabric.
[image by @sockobsessionyarns]