How does fracking compare to other methods of producing oil and natural gas?

Which statement best describes a major advantage of a confederal system of government over a unitary system

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

What tactic did palestinians use against israel in 1987