How does it work to produce energy for individuals and whole groups or communities?
Are there products created or other uses for this energy? Some of the uses of coal are house heating or cement production or even steel production.
Who uses it now?
Coal is mainly used by the United States, China, India, Japan, and Russia. http://www.google.com/search?hl=en&safe=active&q=unites+states&bav=on.2,or.r_gc.r_pw.&biw=768&bih=928&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=ChMRUYWENYKu9ASsyICQDw#biv=i|4;d|GuNDK8kY74Z-VM:
How a coal power station works