SWISS transports people and goods all around the world. As demand for mobility grows, so does the impact on the environment.

At SWISS, environmental stewardship is an integral part of the corporate culture. Its commitment has paid off: In recent years, SWISS has reduced its specific emissions by 15%. Plus, it has drastically cut its fuel consumption and thus emissions of greenhouse gases such as CO2 or water vapour per passenger-kilometre through investments in modern aircraft and other measures. Innovative engine technologies also reduce emissions of NOx or soot. Other, less important emissions include sulphur dioxide (SO2), carbon monoxide (CO) or unburned hydrocarbons.


Greenhouse gases and pollutants produced by the combustion of jet fuel.

Jet fuel and CO2
CO2 is the main greenhouse gas. Its emissions are directly correlated with fuel consumption and have dropped roughly 15 percent per passenger-kilometre since 2002.

NOx and water vapour
Jet fuel combustion produces not only CO2, but also water vapour and NOx. SWISS has dramatically reduced these emissions as well. Both substances are greenhouse gases. NOx in particular also impacts ground-level air quality.

Fuel dumping 
Fuel may be dumped from an airplane during a flight in order to reduce the weight of a plane that needs to land shortly after takeoff due to an emergency. Fuel is dumped one to three times per year. The A340 is the only aircraft in the SWISS fleet that can dump fuel.