From the press release:
Global Cool will work closely with Maroon 5’s production team, management, and the boys themselves to reduce the carbon emissions produced by the world tour before offsetting the remaining emissions that cannot be reduced. For its part, Maroon 5 will donate $1.00 for each ticket purchased in North America to buy offsets that go toward making the tour "carbon neutral."
Frontman Adam Levine says the band is proud of the Global Cool partnership and the plans for a carbon neutral tour. "Our world is in a serious predicament right now, and we all need to play a role in reversing the catastrophic effects of global warming."