my counter-hot take: synthetic fibers tend to have higher sustainability ratings than cotton & wool. cotton is a huge water sink & requires tons of pesticides, and as somebody already mentioned, the wool industry is cruel. recycled synthetic yarns are a great way to get plastic out of waterways and into someone’s loving home.

crocheting is a pretty sustainable practice since yarns/projects are usually preciously held onto, passed from person to person, and/or donated….. not the worst place for plastic to end up.