Many High Street credit cards make no contribution to helping the planet whatsoever - they're there simply to make a profit. By using environmentally aware, ethical credit cards you can make a small contribution to good causes such as protecting endangered species or helping starving families in the Third World.
The Co-operative Bank credit card. Half an acre of Brazilian rainforest purchased and protected in your name when you transact on your credit card for the first time, plus a contribution of 25p will be made to Cool Earth for every £100 spent on the card.
The WWF credit card - contribute as you spend and enjoy great rates! The first time you use your card, MBNA will contribute to WWF, plus additional contributions will be made by MBNA every time you use you card, all at no extra cost to you.