He points to Spain, where farmers do not own the water and therefore could not trade it without disentangling water rights from land rights, which is tricky.

• 他举了西班牙的例子，那里的农民对水没有所有权，因此只要水权没有和地权脱钩，就无法进行交易，而二者的脱钩是很微妙的。