Singapore economy suffers from smoke

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For the past few days Singapore has been shrouded in a severe haze, caused by drifting smoke from wood-fires on Indonesia's Sumatra.

It prompted the government in the city state to issue health alerts as the Pollutant Standards Index hit its highest level since 1997.

There is a cost to health, but the problem, which is almost an annual one, also has economic repercussions.

The BBC's Sharanjit Leyl reports.

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