Drained peatlands today cause more CO2 emissions than all global air travel combined — which is why  some farmers in Germany are experimenting with rewetting these areas. But so far, it remains a risky business model. Anyone visiting farmer Henning Voigt's operation near Germany's Baltic Sea coast stands a good chance of getting their feet wet. About 25 years ago, his father began rewetting a once-drained peatland. "We've been an organic farm since 1996 and currently manage 350 hectares (864