91d.sticky substance from a tree(5)ser-n 107d. absence from school(5)e-e-- 118a. space shuttle name(8)---a-t-s 86d.credit(9)a-t-i-u-e 99d.break,opening(6)h-a--- 115a.needless(5)--d-e...
Coal is primarily used as a solid fuel to produce electricity and heat through combustion ... what type of fuel is it ?? can only think of fossil fuel ???
stuck on these last two,
17 across, a mind as yet uninfluenced by external influences
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24 down military term for time off
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many tks in advance...