Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
methd of coal extraction
3.
type of coal
6.
another name for coal
7.
gaseous mixture of carbon monoxide and hydrogen
8.
Toown gas
9.
a fossil fuel
Down:
2.
Major producer of world's coal
4.
mixture of CO and nitrogen
5.
porous and purest form of carbon
6.
mixture of methane and carbn dioxide
OK