The latest Liberal Democrat TV film (PPB) persuasively puts the case for urgent action to protect our environment.

"It is our duty to future generations to act and to act now. Only the Liberal Democrats have the vision, and the will, and the courage to make sure that the planet remains safe for our children and our children's children," says Ming Campbell in the film, which you can watch online now:

You can support the Liberal Democrat campaign for urgent action on climate change by signing our Green Tax Switch petition.