This lovely photograph was taken by Michael Lancaster c1968. My first thought, on finding it this morning, was that is showed a sustainable approach to cutting grass. But do the water buffalos emit more C02 than the small amount of hydrocarbon a motor mower would use? Perhaps. But the buffalo C02 would be endlessly re-cycled and the fossil hydrocarbon would be transferred from the earth’s crust to the earth’s atmosphere. Another point evident from Michael’s photograph is that this is not how the greenspace should be managed. It ought to be a lush area of fruit and flowers.