Reuters: Spain has bought rights from Hungary to emit 6 million tons of greenhouse gas through a government-level emissions trading scheme under the Kyoto Protocol, a Hungarian government official said on Thursday. “We have sold 6 million (emissions rights) to the Spanish government. According to our knowledge this is the biggest single sale (of its kind) in the world so far,” said Lajos Olah, state secretary for Hungary’s Ministry of Environment and Water. Spain plans to buy 159 …