By Martin Wolf

“The increase in China’s energy demand between 2002 and 2005 was equivalent to Japan’s current annual energy use.” This nugget of information, buried in the International Energy Agency’s latest World Energy Outlook, tells one almost all one needs to know about what is happening to the world’s energy economy.

Neoclassical economics analysed economic growth in terms of capital, labour and technical progress. But, I now think, it is more enlightening to view the fundamental drivers as energy and ideas. Institutions and incentives provide the framework within which the development and application of useful knowledge transforms the fossilised sunlight on which we depend into the stream of goods and services we enjoy.

This is the world of abundance that China and India are now joining. Nothing short of a catastrophe will stop them. For the pessimists, however, particularly climate-change pessimists, catastrophe will follow. What is certain is that the challenges ahead are huge.

The remainder of this column can be read here. Debate from our guest economists appears below.

By Martin Wolf

Energy security and climate change are two of the most significant challenges confronting humanity. What we see, in response, is the familiar capture of policymaking by well-organised special interests. A superb example is the flood of subsidies for biofuels. These are farm programmes masquerading as answers to energy insecurity and climate change. Not surprisingly, they have the depressing characteristics of such programmes: high protection, open-ended support to producers, and indifference to economic rationality.

Already the support in members of the Organisation for Economic Co-operation and Development costs about $13bn to $15bn a year. But this sum generates much less than 3 per cent of the overall supply of liquid transport fuel. To bring the biofuel share to 30 per cent, as some propose, would cost at least $150bn a year and probably more, as marginal costs rose.

Someone needed to take a close look at the rationality of all these supports. An excellent report from the Global Subsidies Initiative of the International Institute for Sustainable Development does just that. It does not tell a pretty story.

The remainder of this column can be read here. Debate from our guest economists appears below.