Guardian: Nicolas Sarkozy today vowed to lead the fight to “save the human race” from global warming, launching a carbon tax to encourage French families and industry to cut their use of fossil fuels. From 2010, France will become the biggest European economy to levy a carbon tax, following other successful schemes introduced by Nordic countries in the 1990s. The tax – initially set at EUR17 (£15) per tonne of carbon dioxide emissions – will be levied on individuals and businesses for …