There have been times where we've taken those inputs for granted; we're not now. And so while we had access to large amounts of gas across the globe and it was producing urea for very low cost and you just poured it on, with the impact on the environment, now, the cost of urea has gone up. So people will have to revert back maybe to legumes, which was the basis on which we built our pastoral system, and those clovers that contributed the nitrate from the atmosphere into the ground for the grasses to be taken up and utilised were the efficiency that drove our success in the international marketplace. Now, that's been pushed to one side as we've had cheap urea and poured it on and blown the clovers out of the sward. Now we're going to have to go back. 