"Both Delhi and Beijing had begun their fight against air pollution neck-to-neck, but Delhi has lost steam midway. Beijing has moved ahead because of its decisive action," according to a new study by the CSE.
Anumita Roychowdhury, head of CSE's air pollution control team said: "If we apply the air quality classification and health alert system of Beijing or the US to Delhi this winter, this city would be in a frequent state of pollution emergency requiring contingency action."
The CSE review was done in the wake of serious public health concern over air pollution levels this winter in Delhi, a release said.
The review and analysis highlights that Delhi leads in reporting of real-time data to assess risks better.