At the start of 2011, I thought the hallmark of the year's energy events and trends might involve regulation, with the White House seeking to implement measures that couldn't garner enough support in Congress to become laws. But for every major new regulation issued, such as last week's release of the new Mercury and Air Toxics Standards for power plants, others were delayed or deferred, including the EPA's effort to regulate greenhouse gases under the Clean Air Act and the agency's proposed ozone standard. Outside of the utilities and other industry groups directly affected by these rules, it seems likely that 2011 will instead be remembered for big, unpredictable events like the Fukushima nuclear accident and the Solyndra bankruptcy scandal, along with several major trends that...