8)
Reserves are the natural resources that have been discovered; can be accessed with current technology and economically feasible to extract.
So the reserve is identified, and economical to produce.
so 2nd option is correct option.
9).
● Zero-valent iron (ZVI or Fe0) remains the reactive medium that is most used in permeable reactive barriers.
● Permeable Reactive Barrier (PRB) is an in situ treatment zone in which pumice, perlite and lime using as permeable reactive barriers.
● A permeable reactive barrier (PRB) is an in situ remediation method that used limestone, and phosphate-based adsorbent materials (Conca 2002) as permeable reactive barrier.
So by above information we can conclude that 2nd option is correct bacteria.
if helpful give ?.
thank you.
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