Six trains were cancelled as it was a partly cloudy Friday morning in the national capital with the minimum temperature recorded at 13.9 degrees Celsius, a notch above the season's average.

In a major measure which can curb pollution coming to Delhi from adjoining states, the central government is likely to impose an obligation on thermal power plants to mix coal with a 10 per cent component of straw pellets or briquettes, the Union Power Minister R.K. Singh said on Thursday.

It was a misty Thursday morning in the national capital with the minimum temperature recorded at 13 degrees Celsius, which is the season's average.

Over half of Delhi's college students were suffering from respiratory problems during smog week, a survey has found.

National Green Tribunal on Monday rebuked the Delhi Government for not filing the review petition of its order against an exemption to women drivers, two-wheelers and government servants in the proposed Odd-Even rule to tame pollution.

US-based passenger carrier United Airlines on Saturday said it has temporarily suspended its Newark-New Delhi flights due to poor air quality concerns in New Delhi.

The country's top green court on Friday questioned the efficacy of the Delhi government's proposed odd-even vehicle rationing scheme that was to be rolled out from Monday as the capital and its suburbs remained shrouded in a dense haze, with air pollution levels continuing to be "severe".

The alarming pollution in Delhi has led to at least 20 per cent increase in the number of persons complaining of cardiac/respiratory problems this week, officials said on Thursday.

A day after Delhi witnessed its worst 'air quality' and 'smog situation' of the year, Chief Minister Arvind Kejriwal on Wednesday said he wished to meet his Haryana and Punjab counterparts to find a solution to pollution in the National Capital Region.

Delhi education minister Manish Sisodia on Tuesday ordered primary schools to remain closed until further notice in view of the dense smog covering the national capital.