The land-use provisions get trickier when it comes to considering what is called indirect land-use change—the “knock-on” effects of land use, an especially hot topic for the European Union. “Indirect” is when, for instance, a biofuel crop displaces a food crop, which in turn, seeking new land for cultivation, leads to deforestation and a potentially large release of carbon. How is this going to be measured? And, by the way, who is doing the measuring?

Daniel Yergin, The quest: Energy, security and the remaking of the modern world, New York, 2011, p. 703