> Some sites show me the three-hour flight will cost 616kg of CO2. Is it per person? I don't know. Let's assume per person (even though I'm pretty sure it's for

> Some sites show me the three-hour flight will cost 616kg of CO2. Is it per person? I don't know. Let's assume per person (even though I'm pretty sure it's for the entire flight). It is per person, going by plane takes roughly as much as going by car if it is over land. Stockholm to Barcelona is according to Google 2788 km. Typical car takes 1.2 litre per 10km, so the whole trip would be around 300 litres of petrol. 1 litre of petrol is around 2.4 kg CO2, so over 700 kg CO2 for the entire trip.