It may someday be worthwhile to try to recover uranium from seawater, but at present this process is prohibitively expensive.
It may someday be worthwhile to try to recover uranium from seawater
Someday, it may be worthwhile to try and recover uranium from seawater
Trying to recover uranium out of seawater may someday be worthwhile
To try for the recovery of uranium out of seawater may someday be worthwhile
Recovering uranium from seawater may be worthwhile to try to do someday
B: try and recover
C: *uranium out of seawater* is wrong, suggesting that uranium, in big volumes, is kept in sea and it just need to be taken out from the sea. But actually uranium is processed out.
D: try for
E: *Recovering ... try to do* (redundant)
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