A discovery by scientists may have more than doubled the world’s energy reserves. They have found vast amounts of natural gas frozen into the sea bed, potentially containing more energy than all the world’s known coal, oil and gas reserves combined. The research follows the growing excitement generated by Japan Oil, Gas and Metals National Corporation (Jogmec), which has been drilling test wells into methane hydrate reserves in the Nankai trough, off Japan’s southwest coast. It predicts the first gas will be extracted this year, and suggests there could be enough methane hydrate in the trough to supply all Japan’s energy for 300 years. --Jonathan Leake, The Sunday Times, 15 January 2012