Vodafone UK during the past 12 months reduced by "more than a quarter" its business travel-related airline flights as part of a commitment to reduce carbon emissions

. The company last summer signed on to participate in environmental organization WWF's One In Five Challenge, which encourages businesses to reduce flights by 20 percent within five years. Vodafone reported that "by encouraging mobile working and reducing the need to travel," it cut 3,500 employee flights and reduced carbon emissions by 617 tonnes.