How does one type of coal differ from another?

Coal is classified according to:

energy value – how much energy is released when coal is burned
the degree of transformation of the original plant material into carbon, ranging from anthracite – the hardest – down through bituminous, sub-bituminous and lignite
moisture content – coals high in carbon and low in moisture are ranked the highest
composition – coal is predominantly carbon but may also contain varying amounts of hydrogen, oxygen, nitrogen and sulphur

How are environmental impacts of mining addressed in Alberta?

Environmental management is an important part of developing, running and closing down a mine. Mining companies develop and carry out plans to minimize impacts on air, land, water and wildlife. Companies use a variety of techniques to reclaim mined lands to predetermined uses.

Who regulates mining in Alberta?

Depending on the type of mineral, mining activities and reclamation are subject to review and approval through Alberta Environment, Alberta Sustainable Resource Development and the Energy and Utilities Board. Alberta Human Resources and Employment is responsible for mine safety.