Air quality at unhealthy levels in parts of Singapore | Video
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Air quality at unhealthy levels in parts of Singapore | Video(Updated: )
The hazy conditions present in Singapore since early Wednesday morning was due to an "accumulation of particulate matter", the National Environment Agency (NEA) said, as air quality edged into the "unhealthy" range in the eastern part of the country at about 11am, before readings in the south rose in the evening. Deborah Wong reports.