New Delhi, Nov 15 (PTI) Delhi Environment Minister Manjinder Singh Sirsa on Saturday said the national capital is witnessing high pollution levels primarily due to PM10 emissions from construction activity, dusty roads and traffic congestion, and the government is intensifying identification of hotspots.

The city's sanitation systems and road conditions require "lot of work", Sirsa said, adding that gaps in local upkeep were contributing significantly to deteriorating air quality.

"The major reason for pollution in Delhi is PM10, which is mainly from construction sites, dust on roads and several other factors. We have identified 62 such hotspots where traffic or dust are the main causes, and we are working on them," the minister said.

He said the onset of winter is worsening the situati

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