Bibliography

• Geography 12- Second Edition H.P. Sovio
• http://en.wikipedia.org/wiki/Coal
• http://wiki.answers.com/Q/What_are_the_advantages_and_disadvantages_of_using_coal_to_generate_electricity 
• http://www.google.ca/imgres?imgurl=http://www.energydigital.com/global_mining/coal-705301.jpg&imgrefurl=http://www.energydigital.com/global_mining/us-coal-exports-booming-in-europe&usg=__hIWuIfBnTjT8qQo-OnYTNWEdR3Y=&h=604&w=900&sz=196&hl=en&start=6&sig2=Jr5Wl9KvYUe5emDjtyivmw&zoom=1&tbnid=UQhx86f8Opa8kM:&tbnh=98&tbnw=146&ei=waH3UP25Is_oigLQhoC4AQ&prev=/images%3Fq%3Dcoal%26hl%3Den%26client%3Dsafari%26sa%3DX%26rls%3Den%26tbm%3Disch&itbs=1
• http://fishandbicylces.files.wordpress.com/2011/03/coal_train.jpg
• http://www.giantbomb.com/coal/93-5748/all-images/52-624346/coal_shovel_1_/51-2294832/