Secretary-General Ban Ki-moon with participants at the Second Assembly of the International Renewable Energy Agency in Abu Dhabi.
What's the most money you've ever spent on a t-shirt? A We're guessing it's no where near theA A 256,500 price-tag on this diamond-encrusted number.
An EvGo charger for electric cars is used in the parking lot for NRG Energy in Princeton on Friday, January 20, 2012.
President Barack Obama's State of the Union address was a prime example of this shift.
Natural gas vehicles are not yet as common as more traditional uses of the fuel like gas-powered furnaces, stoves and water heaters.
