He joined hundreds of  of Team Green Britain school children, Olympians and celebrities who made personal pledges in a symbolic and collective gesture for tackling climate change to remain a key focus for the future. 

Topping the list of British school kids' promises for the future are turning off computers and video games at night, encouraging parents to recycle more and walking to school more frequently.

Team Green Britain celebrity ambassador, Danielle Lineker, also added her pledge to cut back on plastic shopping bags, the amount of football watched on television at home as well as time in the shower. 

The hundreds of promises from across the country will be displayed on the back of environmentally friendly pedal-bikes and cycled into London where they will be presented to Greg Barker, the Minister of State for Department for Energy and Climate Change (DECC) to mark the second annual Green Britain Day, created by London 2012 sustainability partner, EDF Energy. 

Barker said: "Reducing our carbon footprints will make a positive difference to both the environment and our energy bills.

"Even small changes in our daily lives can add up to big differences so today I am happy to be supporting Team Green Britain."

Ed Milliband, the Shadow Secretary of State for Energy and Climate Change and one of the front runners to replace Gordon Brown as Leader of the Labour Party, also joined in the campaign.

He said: "As well as being a fantastic sporting event the London Olympics are a great opportunity to inspire our communities across the UK into action.

"Climate change is the biggest challenge the world faces and even the smallest changes to our daily lives can add up to a big difference. I encourage everyone to do something green for the team by joining Team Green Britain."

The delivery and signing of the green union flags on pedal bikes was followed by an action packed Green Britain Day consisting of Team Green Britain community events at 12 shopping centres or outdoor spaces across the country with fun activities related to food, home and travel for thousands of people to enjoy.  
 
Last year’s inaugural Green Britain Day drove membership of Team Green Britain into the hundreds of thousands and over 800 schools across the country pledged to hold events involving local communities to celebrate the day and learn how they can reduce their individual carbon footprints by up to 20 per cent, with potential savings of up to £166 per year on energy bills, as a result.
 
Eva Eisenschimmel, the chief executive operating officer of EDF Energy, said: "We can only tackle climate change effectively by working together as a team.

"As the UK’s largest producer of low carbon electricity and London 2012’s first
sustainability partner, EDF Energy has kicked off the second Team Green Britain to bring people together to reduce Britain’s carbon footprint.

"Following the success of Green Britain Day in 2009, we’re once again using the power of the Games to inspire employees, our customers and all those interested, to save money and save energy.

"We believe that Green Britain Day and Team Green Britain will provide more schools and communities with the inspiration, the knowledge and the support they need to change today for a lower carbon tomorrow.

"The pledges and promises from Team Green Britain school kids, celebrities and Olympians today shows just how people can make simple changes that will reduce their carbon footprint in ways which are better for them and the environment.

"We want everyone to get involved too by signing up to be a part of the Team at www.teamgreenbritain.org." 

Tim Smit, the chief executive and co-founder of the Eden Project, said: "The Eden Project is backing Team Green Britain because we believe in celebrating the small cultural changes that people are happy to make, but that collectively make a big difference. Green Britain Day is like a metaphorical New Year’s Day, to give people the chance to say, 'OK, it’s just one day; we’ll turn our lights off.'

"Once people have done it one day, they'll think, why not do it every day?"