Travelling by air with a clear conscience is a simple matter these days. All you have to do is plant a few trees. Not personally, of course. There are companies that will do for it you. They calculate how much CO2 you emit during your flight, how many trees it will take to make your flight 'climate neutral', and make sure the requisite number gets planted. Et voilà: the climate is saved, the middleman has made some money and you can continue doing business as usual. That's the theory, anyway. The reality is more complex.
Climate compensation; Is the planet getting what you pay for?
The rapidly growing market for voluntary CO2 compensation is developing quality marks and standards to battle its poor public image. In this way, market players hope to grow their business - and to keep the government out of it.