Smokeless fuel are fuels which do not produce visible smoke when burned. The term is usually applied to solid fuels, such as: Anthracite & Charcoal.
Smokeless Fuels are not just manufactured, they can also be found naturally in the form of anthracite. Anthracite has a very high carbon content, sometimes as high as 98%, which means that it contains less volatile materials and therefore does not give of any thick smoke when it is burned.
As the name suggests, smokeless fuels have been designed with the environment in mind and they became more popular after the 1956 Clean Air Act, which was an attempt to make the air quality in towns and cities better after the ‘Great Smog’ of London in 1952.