The fuel type you use will affect how much your fire will cost to run and the level of emissions released
It’s difficult to make comparisons between the cost of heating with different fuels, but generally speaking, wood pellets (a bio-fuel suitable for stoves) and logs are cheaper than electricity and LPG (liquefied petroleum gas).
It might be that you live in an area where you can’t burn fuels such as coal, so you’d have to use a smokeless fuel. Not only better for the planet, smokeless fuels are also less likely to cause chimney fires. For a list of authorised smokeless fuels suitable for open fires and stoves, contact the Solid Fuel Association who will also tell you where to find your nearest approved merchant to buy them from. Get more information from the National Energy Foundation.