Claiming that all textiles should be derived exclusively from plants oversimplifies the ecological tradeoffs involved. Animal fibers, particularly wool, are not a major driver of environmental harm compared to many common alternatives.

Wool production relies on sheep that have been selectively bred over centuries to continuously grow fleece. For most modern breeds, regular shearing is not optional; without it, the animals are at risk of heat stress, impaired mobility, skin infections, and parasitic infestations. Shearing itself is not inherently harmful when done correctly and is a routine husbandry practice required for animal welfare rather than an exploitative excess.

There are documented cases of escaped domestic sheep accumulating extreme amounts of fleece over time, resulting in serious health detriment for the animal. These cases illustrate that wool removal is not merely convenient for humans but necessary for animals that can no longer self-regulate their coats in the wild.

From a materials perspective, wool has several environmental advantages. It is biodegradable, long lasting, naturally insulating, odor-resistant, and flame retardant without chemical treatment. In contrast, most synthetic textiles shed microplastics during washing and wear, contributing persistently to aquatic and terrestrial pollution. Even plant based fibers often require intensive land use, water consumption, pesticides, and chemical processing, particularly for crops like cotton.

This of course does not mean wool production is impact free. Poor land management, overgrazing, and methane emissions are real concerns and should be addressed through better agricultural practices rather than ignored. However, when evaluated relative to synthetic textiles and many industrial plant fibers, responsibly produced wool is among the lower-impact options available for clothing. I read that bamboo fiber actually takes an immense amount of water to produce for example.

The broader point I'm trying to establish is that ecological harm is not determined solely by whether a fiber is animal or plant derived.

Durability, biodegradability, land use, chemical inputs, and pollution across the full lifecycle matter more than origin alone. A blanket rejection of animal fibers risks replacing a relatively low-impact material with alternatives that cause greater long-term environmental damage.