Im Kyoto-Protokoll hat sich die Schweiz verpflichtet, die Treibhausgasemissionen bis 2020 um 20 Prozent unter das Niveau von 1990 zu senken. ###>Switzerland will move to reduce carbon emissions by 20% over 1990 levels by 2020 (Keystone) Parliament has agreed to reduce carbon emissions by 20 per cent by 2020 but has voted against introducing a tax on petrol to help it do so.