Sales is an area where job performance is typically closely monitored, which will allow any productivity gains to be measured more clearly, Girard said.

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Wells to extract gases from the area, which were installed in November, are being monitored, the EA said.

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The area falls within an SSSI for its fauna and flora and was monitored by the Countryside Council for Wales.

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Over the past four years, through last year's third quarter, effective retail rents in the Las Vegas area fell 15.4%, the biggest drop of the 80 markets monitored by Reis Inc.

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