Convention 'Greening' Goes Awry The Democrats have embarked on a highly visible effort to make their convention the "greenest" ever, focusing on everything from expanded recycling to more creative programs like encouraging Denver restaurants to offer "lean 'n' green" meals made with healthful, organic, and locally sourced ingredients. But not all of their environmentally friendly initiatives have gone as planned. Take the hotel card keys, for example. Instead of the traditional plastic cards, the Sheraton in downtown handed guests Visa-sponsored swipe cards "made from sustainably-harvested wood." The plan lasted all of a few hours. By Saturday night, enough guests had reported problems getting into their rooms with the wooden cards that the front desk clerks had abandoned them and switched back to the plastic cards. A clerk said they were now handing out one of each and suggested that the wooden one could kept as a souvenir.