Continental has this month become the latest airline to launch a carbon offsetting programme.

The airline said the voluntary programme would allow customers to view the carbon footprint of their itinerary and make a contribution to sustainable tourism lobby group Sustainable Travel International.

The non-profit group will than use the customer contributions to purchase carbon offset credits from independently verified offset projects.

Continental said the scheme was the latest in a line of initiatives to limit the company's environmental impact. It added that streamlined operational processes and a $12bn investment in 270 fuel efficient aircraft has resulted in a 35 per cent reduction in greenhouse gas emissions per mainline revenue passenger mile over the past 10 years.

"Having a high-profile, high-quality offset programme available to Continental's customers is a significant step for mainstreaming carbon offsetting in air travel," explained Brian T. Mullis, president of Sustainable Travel International. "When combined with energy efficiency, greater use of renewable resources, waste reduction and thoughtful consumption, offsetting offers a solid strategy for addressing concerns associated with climate change. "

Offsetting services have become increasingly commonplace among airlines, with BA, easyJet and Virgin all offering customers the opportunity to offset flight emissions.