"If you want to go green, look after your health – a major operation compares to two short-haul flights." So says a recent blog on the Guardian website by Mike Berners-Lee.
"... a big operation clocks up a big footprint. The typical cost of a heart bypass to the UK's National Health Service is £6324. If we assume that this operation is averagely carbon intensive, it adds up to more than 1 tonne of CO2e. That's around a month's total emissions for the typical UK citizen – or a couple of return flights from London to Madrid." Read more here.