Other clean coal technologies include those that that dewater...

Other clean coal technologies include those that that dewater low rank coals. Low rank coals often contain a higher level of moisture content which contains a lower calorific content per tonne. This causes a reduced burning efficiency and an increased emissions output. Reduction of moisture from the coal prior to combustion can reduce emissions by up to 50 percent.[citation needed]
http://en.wikipedia.org/wiki/Clean_coal
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As can be seen from the above[citation needed]the FS is crucial to ESI prospects.