1. Background and definitions

This dossier is devoted exclusively to fuels. However, some products can be both fuels and combustibles. This is the case, for example, with domestic fuel oil (FOD), used both to heat homes and, until 2011, to power the diesel engines of farm tractors and off-road machinery (since replaced by a new fuel, non-road diesel GnR). This is also the case for heavy fuel oils, which are mainly used to supply thermal energy in industry, but also for traction in very large marine...