Eco website carbonfootprint.com has criticised U2 for the massive carbon emissions resulting from their current 360˚ World Tour.

Environmentalist consultant Helen Roberts said that "The carbon footprint generated by U2's 44 concerts this year is equal to carbon created by the four band members travelling the 34.125 million miles from Earth to Mars in a passenger plane".

This is hardly new, as U2 have been touring ridiculously enormous productions since their gargantuan Zoo TV Tour in '92, consisting of 157 shows over almost two years, and dubbed 'the most spectacular rock tour staged by any band'. Clearly the times have changed though. According to carbonfootprint.com, "You also have to add the carbon emissions from the same number of concerts again next year. Just looking at the 44 concerts this year, the band will create enough carbon to fly all 90,000 people attending one of their Wembley concerts to Dublin. To offset this year's carbon emissions, U2 would need to plant 20,118 trees."

There are still a limited number of production seat tickets left for U2's three concerts at Croke Park on July 24th, 25th and 27th.