First the latest news from Guinness World Records: The world’s most efficient combined-cycle power plant started producing electricity near the village of Bouchain in northern France today. The plant’s beating heart – an advanced GE gas turbine – can convert more than 62 percent of fuel energy into electricity. For the power-generation crowd, that’s like Neil Armstrong and Buzz Aldrin landing on the moon or Sir Roger Bannister breaking through the 4-minute-mile barrier.