According to the Lib Dems, nine reindeer would emit methane with a global-warming impact equivalent to 40,667 tonnes of carbon dioxide as they covered the 122 million miles needed to deliver to every house in the world.
This makes his sleigh ride almost as environmentally unfriendly as an aircraft, which would produce 41,480 tonnes of CO2 on the Christmas Eve trip.Of course, the question arises of whether a bus covering those distances at the speed required to deliver all the presents would be any less polluting. Unless they mean that Mr. Claus uses existing bus services and other public transport to do his deliveries, in which case they would most probably take many years to complete, and leave many non-urban children completely without presents.
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