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Delegates from more than 190 nations concluded the United Nations Climate Change Conference in Cancun, Mexico, on Friday. For the second year in a row, the gathering concluded with a set of nonbinding agreements.

The U.S. Supreme Court on Monday agreed to hear challenges from five major power companies on a federal appeals court decision that ruled they could be sued, under a federal “public nuisance” law, to curb greenhouse gas emissions, which allegedly cause entity-harming climate changes. Industry experts say the case will likely be heard by the high court next April, and a decision could be made as early as June.

More than 52 GW—16%—of the existing U.S. coal-fired generation fleet will be retired rather than face the cost of compliance with pending air quality regulations between 2015 and 2020, engineering and consulting firm Black & Veatch predicted in its end-of-year Energy Market Forecast.

India’s Atomic Energy Commission and its state-owned Nuclear Power Corp. of India Limited (NPCIL) on Monday signed major agreements with France’s AREVA for the construction of two EPR reactors—the first of a series of 6—at Jaitapur in the western state of Maharashtra.

Dominion Virginia Power last week struck a deal with the National Park Service and the Virginia Department of Environmental Quality to close a 74-MW West Virginia coal-fired plant as part of plans to build a new 1,300-MW natural gas–fired power station in northwestern Virginia.

Ten European Union (EU) countries last week signed a memorandum of understanding  to develop an offshore energy grid linking renewable wind energy sources in the North Sea and put it into operation by 2020. The nations also committed to working together to overcome the regulatory, legal, market, planning, and technical issues involved in creating a North Sea grid.

PJM Interconnection, a regional transmission organization that ensures the reliability of eastern U.S. high-voltage grids, last week approved $1.25 billion in transmission improvements, including a capacity improvement project to rebuild one of the most heavily used transmission lines in PJM.

With utilities already alarmed by looming federal regulations that could force construction of expensive cooling towers that would sharply increase water use, a report by the Energy Department’s Argonne National Laboratory warns that nearly 350 U.S. coal-fired power plants are vulnerable to potential water demand or supply conflicts over the next 20 years stemming from increased competition for dwindling water resources—particularly in the Southeast.

While U.S. coal production has been stagnant in 2010, demand for coal in China and India has sharply risen this year and could represent the early stages of a "long-term supercycle" for the global coal industry, according to Peabody Energy, the world’s largest private coal company.

Combustion flue gas analysis has been used to optimize the boiler air/fuel ratio for decades. Measuring the amount of excess oxygen and/or carbon monoxide in combustion flue gases gives an indication of boiler efficiency and, thereby, plant operating economics. New sensors make those measurements simple and accurate.