They displace people from modern resources, like clean water and sewage systems, that prevent infectious disease from spreading.
They have been criticised by some, who argue that they will not create jobs but displace them from other areas.
Often their effect has been to displace the problem from the Gulf of Aden to the Indian Ocean.
Its subsidies to corn producers helped to displace rival producers from third-country markets, such as Mexico, Canada and the Philippines.
Even a cursory assessment of the hurdles unmanned aircraft must overcome before they can displace human pilots from the performance of most military missions suggests the technology has been oversold.
These pairs are difficult to break up, so any intruding electron, unable to displace an incumbent from a pair, must occupy a higher, vacant energy level within the superconductor in order to stay put.
It also matters that those additional supplies of oil would displace purchases of imports from the Middle East and Venezuela.
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Bridge has struggled to displace Argentine Pablo Zabaleta from City's starting line-up and has faced further competition from summer arrival Aleksandar Kolarov.
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In a poor market environment like we are experiencing right now, the price depreciation of dividend-paying stocks can completely displace the gains made from the dividends.
When Mrs Arroyo, who was vice-president at the time, took over from him, rioters promptly attempted to displace her.
Renewable fuels like ethanol from corn and other biomass sources can displace oil in vehicles, if we help create the opportunity.
But in his weak result, many saw the likelihood of a harder-line figure from the dominant Malay UMNO party emerging to displace him.
Meanwhile, companies like General Electric, Kodak, Dow Chemical and Ingersoll-Rand have indicated that they will displace American jobs by supplying the domestic market and markets in other countries with exports from their Chinese factories.
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