Sentence examples for proved unviable from inspiring English sources

So industry leaders first disputed that lead in gasoline was the source of lead in the water and atmosphere (somewhat like those who later would claim that climate change is a hoax); when that proved unviable, they said, sure, but lead in the environment was not a health hazard (sure, climate change is real but not caused by human activity, a natural variation of no concern).

If the eggs prove unviable, he said, it will almost certainly be because they were never fertilized to begin with.

But Russian authority is now so remote a memory that, even if Chechnya proves unviable as an independent state, it is hard to conceive of it ever again being subject to Moscow.In March, after Russia's latest government shuffle, no single top official was given the job of dealing with the breakaway republic.

Several wells it had triumphantly announced proved economically unviable.

And oil drilling was also under way, they say, in view of the "Jetty" in 1970, though it proved economically unviable.

The regulator is already investigating OGX and several of its current and former managers, including Mr. Batista, over allegations that the company, which frequently announced major petroleum finds that subsequently proved economically unviable, may have violated disclosure rules about its operations.

Alaska initially operated Jet America as a separate airline, but this proved economically unviable, and Jet America's operations were merged into Alaska's.

The initial structure solution by molecular replacement failed and the approach proved to be unviable due to the complexity of the problem.