For ten points, name this black sedimentary rock that is commonly mined as a fuel source.
Workers in this industry were led by Arthur Scargill in a 1984 strike that was defeated by Margaret Thatcher, leading to a decline in this industry, which unofficially ceased in the UK in 2015. The production of this good and (*) steel normalized competition for resources within Europe and inspired the creation of the European Union. For ten points, name this black sedimentary rock that is commonly mined as a fuel source.
Workers in this industry were led by Arthur Scargill in a 1984 strike that was defeated by Margaret Thatcher, leading to a decline in this industry, which unofficially ceased in the UK in 2015.
coal (accept coal mining; accept European Coal and Steel Community; prompt on "mining;" prompt on "ECSC")