DENVER - Planners of the Democratic National Convention are limiting the party's carbon footprint through a unique partnership with an Indian-focused environmental business. The Democratic National Convention Committee began working with NativeEnergy Inc. this spring to purchase carbon offsets for the dozens of convention staff who are flying, driving and otherwise polluting Denver as they carry out the big event. Party organizers are now asking that delegates, members of the media and other political officials who will be attending the late August gathering do the same. Delegates to the convention with the highest percentage of members offsetting their carbon emissions...