While no commitments were undertaken, tourists were encouraged to consider the environmental impacts of their travel options. Tourism contributes some 5% to climate-relevant emissions through air travel, and the trend is rising. The tourism industry does not just have a shared responsibility for climate change; it is also directly affected by it. Winter tourism in the Alps for instance is already suffering from a lack of snow in many places.
Source and information: http://www.swissinfo.ch/ger/startseite/detail (de) 03.10.07, http://www.unwto.org/climate/index.php?op=0 (en)