Prof Peter Lynn, an expert on survey methodology from Essex University, says the findings may be unreliable.

BBC: How one question can change the NHS

Jim Childs, a master electrician and the top civilian expert in an Army safety survey, said problems were "everywhere" in Iraq, where 18 U.S. troops have died by electrocution since 2003.

CNN: 'Multiple' failures led to Iraq electrocution, Pentagon says

Commenting on the latest findings, Dr Dominic Hodgson, an Antarctic lakes expert from the British Antarctic Survey (Bas) in Cambridge, said the research raised the possibility that there was life on Mars.

BBC: Antarctic lake's secret water

More than a third of institutional investment-management firms use expert networks, according to a late 2009 survey by Integrity Research Associates in New York.

WSJ: U.S. Pursues Sweeping Insider-Trading Probe

"It can be very difficult to predict collapse because there is very little surface evidence of the features, " says Dr Vanessa Banks, an expert in shallow geohazards and risk at the British Geological Survey.

BBC: Who, What, Why: How are sinkholes formed?

In fact, two different sources of data ( a survey of scientists and a study linking agreement to the credibility of the expert) converge on the same fact: 97 to 98 percent of climate scientists are convinced by the evidence for anthropogenic climate change.

FORBES: Climategate-gate: The Dangerous Psychology of Ongoing Climate Change Denial