Gas has become so cheap that it can be substituted for coal as an electricity-generating fuel.
Advocates admit that the only way coins can be substituted for paper is to remove the paper version from circulation.
The law requires that the judgement of a few bureaucrats in Washington be substituted for the individual decision-making of hundreds of millions of Americans.
FORBES: The Looming Failure of Obamacare, Part 3: Rent-Seeking
The paper was remarkable not only for being accepted by a major journal but also because it considered wives and whores as economic "goods" that can be substituted for each other.
Bay scallops belong to the same family: They are much smaller, about half an inch, but can be substituted for sea scallops (use three bay scallops in place of one sea scallop).
They urge that the pace of reform be slowed and simultaneous elections for both the presidency and a new parliament be substituted for the sequential approach announced by Yeltsin a fortnight ago.
Though there are many more bonds than equities, they are far more homogenous, and thus can be relatively easily substituted for each other in portfolios.
It will not take long, he claims, for the proceeds to be substituted or diverted to the government's preferred ends.
With Kris Boyd a peripheral figure, thanks in part to the attentions of McLaughlin, he was substituted midway through the second half for Kyle Lafferty, rumoured to be attracting interest from Wolves.
Rosicky was substituted at half-time in Arsenal's win and Wenger confirmed the midfielder could be out for a month.
Since oil is easily substituted for natural gas in many industrial and electrical turbines, prices of the two commodities tend to be correlated (coal less so).
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