General Motors' Bob Lutz, a strong advocate for the company's Chevy Volt, plans to retire by the end of the year.
Lutz is leaving during a year when GM will have to fight hard for its survival. The automaker has said that it still plans to launch the Volt, a plug-in hybrid-electric car, in 2010 despite its financial woes.
Lutz, who has been the vice chairman for global product development, will become a senior advisor starting on April 1, the company said Monday. Thomas G. Stephens, GM’s current executive vice president for powertrain and quality, will take over Lutz’s job.
Lutz has been a big supporter of the Volt, which GM is banking on to set itself apart from other...

If you attend lots of energy seminars and conferences and speeches -- and yes, I do -- you start to hear a common refrain and it goes something like this: Energy storage is the missing link for renewable energy. Sometimes the word “holy grail??? will be substituted for “missing link.??? (Note that attached picture is a holy hand grenade, not grail.)
Wind turbines are useful only when the wind blows and photovoltaic panels work only when the sun is shining. Therefore these renewable energy sources are not considered “dispatchable??? and require a measure of dispatchable backup (typically in the form of a non-renewable source such as natural gas).
“We can make...