automotive giant General Motors (GM) yesterday launched a major restructuring plan designed to bolster production of cleaner, more fuel-efficient models, cease manufacturing at four factories producing trucks and SUVs, and launch a review into selling off its iconic Hummer brand.

 Environmentalists welcomed GM's decision to review the future of the Hummer, a 2.6 tonne vehicle which does only 10 to 15 miles to the gallon and has been repeatedly attacked by green groups as a symbol of the auto industry's alleged failure to take environmental concerns seriously.

Learn more about the future of the Hummer here.