It's easy to see why transportation is the most bitterly contested problem in the climate change debate. Why? Because it's ours.

We can think about other tricky questions - how we should produce our electricity, for instance - with something like equanimity. The stakes are high and the problems complex, but the topic looks amenable to sober calculation. After all, the burden of sorting it out falls on someone else, doesn't it?

Not so transport. Here, the question is about freedom - the freedom of ordinary, private individuals like us. Just when we were enjoying greater mobility than at any other time in history, the eco-lobby had to step in and break up the party. All our beautiful cars, our marvellous holidays, are making the planet uninhabitable.

So what can we do? Sit tight? Or find new ways of getting out and seeing the world without leaving sooty footprints? Fortunately, help is at hand.

In this guide, you'll discover cutting-edge eco cars and virtuous vacations. You'll learn how to reassess your whole approach to transport, and find out who to trust on the wild new frontier of the carbon offsetting business. You might even find you can save some money.

With a little bit of thought, freedom can be compatible with a clean conscience.