Hezbollah Vows To Continue Resistance...
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No best answer has yet been selected by kinkyben. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.....and it's usually the lower grade, bituminous and sub-bituminous coals that cause the problems.
Best quality Welsh anthracite is a smokeless fuel in its own right - the natural form requiring no processing to be classed as such. (Anthracite is the highest grade of coal - ie. it has undergone the greatest degree of coalification.)