Internationally, the carbon trading market has become one of the biggest commodities markets in the world. It's estimated to be worth about $175 billion dollars, which makes it a major target for crime.
So much so that Interpol, the international police force, has just issued a guide to carbon trading crime. Here to tell us more is Davyth Stewart, an intelligence officer in the Environmental Crime unit of Interpol.
Interpol's Guide to Carbon Trading Crime