“Globally, cotton production accounts for the use of 22 per cent of all agricultural insecticides.... Nylon is reckoned to be responsible for 50 per cent of UK emissions of nitrous oxide (a poisonous greenhouse gas) and polyester is, of course, derived from petrochemicals.... Alternatives such as bamboo, organic linen, wool grown on ‘biodiverse’ ranches, hemp and innovative fibres such as Ingeo, derived from degradable corn starch, all look much more appealing.”
(via) Cotton also requires
a lot of water.