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The purpose of an indicator is to
asked
Nov 14, 2020
Chemistry
middle-school
2
answers
2
votes
130k
views
Which is a drawback to the use of oil shale to produce energy? Oil shale can be mined only in arid regions. Processing, mining, and waste disposal are expensive. Most of the world’s oil shale occurs in
asked
May 11, 2019
Biology
middle-school
2
answers
0
votes
83.2k
views
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