Cows provide us with leather and meat, but use a lot of grass, grain, and water. Silkworms provide us with silk and silkworm pupae, and all it costs are a few mulberry leaves!
Cows provide us with leather and meat, but use a lot of grass, grain, and water. Silkworms provide us with silk and silkworm pupae, and all it costs are a few mulberry leaves!