RACS 2017 CO2 Offsetting How Your CO2 Footprint Has Been Calculated
Ekos calculates your CO2 emissions footprint using a methodology that complies with the ISO14064-1 carbon standard (the one for calculating CO2 emissions footprints). We also use the latest NZ Ministry for the Environment emission factors for each activity type.
Aviation Emissions Flight emissions are calculated using flight distances using the Air Miles Calculator and applying the correct emission factor for that flight distance. These emission factors take into account Great Circle Flight Distances (curvature of the earth, indirect routes, delays, circling). We also take into account radiative forcing (non-CO2e effects of aviation emissions on climate change - NOx, water vapour, contrails) by applying the multiplier recommended by the European Assessment of Transport Impacts on Climate Change and Ozone Depletion (ATTICA). We also assume the greatest distance for each category - e.g. the 'Upper North Island' category assumes the participant has flown from Kaitaia to Wellington return.
Driving Emissions We calculate driving emissions by assuming each person has driven 200km to get to and from their home airport, and 40km getting from and to Wellington airport (although the distance between Wellington airport and central city is less than 10km). For Wellington participants we have not included the driving from and to the airport.
Waste Emissions We have conservatively estimated wast emissions by assuming that each person accounts for 20kg of mixed waste while attending the conference.
Electricity Emissions We have conservatively estimated electricity emissions by assuming that each person consumes the equivalent of 1 month of electricity consumption for a person working in an office in central Wellington.