Lost in the Forest

On a cold hillside at the edge of western Wales' Cambrian Mountains, more than a thousand saplings, all planted in the last couple of months, are taking root. The trees are local — beech, ash, oak, alder and willow, among others — but the money behind them isn't. Green-minded airline passengers from as far away as the U.S. and New Zealand are stumping up $20 per plant, hoping the trees will absorb from the atmosphere an amount of carbon dioxide (CO2) equivalent to their share spewed out during a flight. To Ru Hartwell, project director of Treeflights.com, which offers...

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