India will release its own report on the most polluted cities in the United States and Europe, Environment Minister Prakash Javadekar said on Wednesday. He also said the report released by the World Health Organization, which listed 30 Indian cities on a list of 100 cities with low air quality, was "misleading."

The report that India will release will take into account various kind of pollutants like ozone, benzene, sulphur dioxide and nitrogen dioxide. The WHO report focuses only particulate matter PM 10 and PM 2.5 pollution, the minister was quoted as saying by the Press Trust of India.

"There is ozone pollution, benzene pollution, sulphur dioxide and nitrogen dioxide pollution among eight major pollutants. All have adverse impact on health. On each parameter, each pollutant, there are different cities in the world which are bad and good," he said.

The minister also expressed surprise about western countries focusing on India and other countries instead of themselves.

"Every citizen has the right to have full knowledge. PM 2.5 is not the only pollutant. There are many cities in the western countries as well which are suffering. So let citizens know that pollution problem is all over, in different categories and degrees," he said.

In a related incident where a western city was found to be hiding its air quality level, newly-appointed London Mayor Sadiq Khan accused his predecessor Boris Johnson of hiding a report on nitrogen dioxide levels in the metropolitan city, the Telegraph reported.