Passengers’ journeys to and from the airport are rarely considered when looking at the carbon emissions associated with flying.
This is according to ABTA – The Travel Association, which believes that a concerted effort is needed to improve public transport links to British airports.
ABTA spokesman Sean Tipton said that the "vast majority" of passengers travel to the airport in their own vehicle.
"If you have more efficient, more regular public transport links to airports, that would clearly help reduce the number of car journeys made to get to the airport," he commented.
Mr Tipton also said that the entire travel industry takes its environmental responsibilities "very seriously" and that airlines in particular are investing in new technologies to lower carbon emissions.
Heathrow, the world’s busiest international airport, recently became Airport Carbon Accredited, with ACI Europe established its airport Carbon Accreditation scheme in June 2009.
ABTA said that while this is "excellent news", the next step should be to encourage travellers to not use their cars to travel to airports.