As part of the BBC Wales Green Season, a satirical look at carbon offsetting. Since the Sixties, concentrations of heartbreak in the atmosphere have risen dramatically. A new website offers a unique market-based solution to an essential problem of modern life. For the cost of a condom, those who have cheated on their partners can have their cheating 'offset' by a global network of fidelity. This satirical documentary follows Alex and Christian as they try to sell the idea of cheat offsetting to a bemused public. From the high streets of Cardiff to the Houses of Parliament, Cheat Neutral sparks an important debate about carbon offsetting.