BECKLEY, W. Va., March 24 (Reuters) - The former chief executive of Massey Energy Co pleaded not guilty on Tuesday to a revised federal indictment arising from a 2010 West Virginia coal mine explosion that killed 29 miners.
Next-generation hybrid cars combining electric and gas power in new ways are emerging as a low-cost alternative for consumers as batteries get cheaper and more efficient.
Researchers in the Cockrell School of Engineering at The University of Texas at Austin have used a combination of metabolic engineering and directed evolution to develop a new, mutant yeast strain that could lead to a more efficient biofuel production process that would make biofuels more economically competitive with conventional fuels.
RIYADH, March 24 (Reuters) - Stronger-than-expected global oil demand should help support crude prices at around $55-$60 a barrel in the next two months despite some signs of a growing glut in the United States, a senior Gulf OPEC delegate told Reuters on Tuesday.
Beijing, where pollution averaged more than twice China’s national standard last year, will close the last of its four major coal-fired power plants next year.
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