As prices surge, what next for China’s green power certificates?

Consider the potato, the most beloved of tubers. In our passion for spuds, humans have consecrated an area of the earth roughly equivalent to the size of Great Britain. From those vast tracts we produce 375 million tons of potatoes globally, which is something like the weight of every car in the United States put together. The world’s potatoes are collectively worth US$116 billion, and the market