"Of course, if this were to (spread to the community), it would make it much more difficult to control, " he said.

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Unlike power plants, which are few in number and so easier to regulate, cars are ubiquitous and much more difficult to control.

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But today's problem of non-point source pollution is more difficult to control.

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Is that enough to reduce the 3, 600 new cases of type 2 diabetes a year, a disease, we are learning, that is more difficult to control in teens than adults?

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"With term limits you've made it much more difficult to reasonably control the council, " Mr. Vallone said.

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Obamacare will also make it far more difficult for companies to control their own health costs.

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Foxconn, in its growing heft as the world's largest electronics contract company, was also getting more difficult for Apple to control, with incidents such as changing component sourcing without notifying Apple, people familiar with the matter said.

WSJ: Apple Shifts Supply Chain Away From Foxconn to Pegatron

The report identified factors that "could have made it more difficult for the student pilot to control the hang glider".

BBC: Glider crash site near Ashbourne

He also told Reuters that most of the weapons evidence has been found but that any further search would be much more difficult after control of the country is returned to Iraqis.

CNN: Former U.N. inspector to head WMD hunt in Iraq

Its network of deep roots, which make up more than half of the plant's biomass, makes it difficult to control with herbicides.

BBC: Invasive plant 'increases ozone pollution'

"Either merger would make it more difficult for other exchanges to compete with LSE in trading UK equities due to both bidders direct control or influence over the provision of clearing services, " it added.

BBC: The watchdog's report could spark further bids for the LSE

The quality control challenge is all the more important because defects in carbon fiber are notoriously difficult to identify until it is too late.

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