Earth-friendly initiatives are picking up steam in the mobile world just as they are with virtually every other industry, and the redesign of the wall warts we all use to recharge our phones seems to be one of the lowest-hanging fruits. The problem stems from the fact that the chargers continue to draw prodigious power even after the phones to which they're attached are fully charged, leading to millions of wasted watt-hours year in and year out. The problem's so fricking big that the top five handset manufacturers put aside their differences long enough to agree on a standard for rating how "green" chargers are, and O2's British outpost wasted no time in jumping on the bandwagon with a universal charger said to be some 70 percent more efficient than your average brick. We imagine most other carriers are going to follow suit on this -- at least, they should -- and at £14.99 (about $22), it looks like there ain't much of a premium for saving the planet. Cheers to that, we say.