What is environmentally friendly cowhide?

Environmental protection cowhide is also a kind of genuine leather, including cowhide and sheepskin. Why is it environmental protection? When processing leather, few chemicals are added. Leather is also softer than ordinary cowhide. That is, domestic leather factories rarely do it, because the output of chemicals added with less leather is much less, and environmental protection cowhide is more expensive than ordinary first-layer cowhide. Environmental protection cowhide shoes basically have no lining.