"Global warming is a clear and present danger," said Chief Executive Andy Harrison. "This generation has a responsibility to take action now. Airlines have an obligation to maximise their environmental efficiency."

A spokesman added: "What we're doing today is saying we're not ducking the issue, and you'll be hearing a huge amount more from us over coming months."

EasyJet said it would help combat global warming by increasing fuel efficiency, pushing for smoother European traffic control and helping passengers offset emissions through trading schemes.

It also warned governments against over-reacting, saying carbon dioxide from aircraft only accounts for 1.6 percent of global greenhouse emmissions.

"Grounding every aircraft in the world would have a miniscule impact on climate change, yet a vast impact on our economies," said Harrison.

Last month, BT Group pledged to cut carbon emissions by 80 percent over the next decade, while Tesco pledged to spend 500 million pounds (US$974.1 million) on environmental measures and Marks and Spencer said it would spend 200 million to go green.

"I believe that we are on the cusp of major advances in aircraft and engine technologies which will lead to dramatic reductions in emissions," said Harrison, referring to new fuels, propulsion systems and composite materials for aircraft.

"As soon as we can power our aircraft with something other than jet kerosene, we'll do so," said the spokesman.