My Lords, the noble Baroness mentioned the new Mayor of London. No doubt the House is aware that the mayor is responsible for air quality in London. We welcome the commitment of the new mayor to lead the improvement of air quality in the capital, building on plans already in place, but we also look forward to seeing his plans in more detail when publishing his consultation. The noble Baroness is quite right when she refers to, for example, children walking to school. It is right that we improve the environment so that they are not put under undue pressure from pollutants.
In 2008 I had the privilege of chairing a Select Committee on allergy. We reported that atmospheric pollution, particularly by diesel particulates, was increasing allergy-related diseases but also hindering the lung growth of small children, particularly babies and primary school children. It seems sad that we have begun to take that seriously only at this point. Will the Government undertake to work with primary schools in particular so that those schools know the level of atmospheric pollution that their children are subjected to on a daily basis, particularly when they are outside, and therefore at least can take some evasive action while the Government work to decrease the diesel particulate contamination of our air?
My Lords, as the noble Baroness will be aware, local authorities are responsible for reviewing air quality in their area, including around schools, and assessing the levels of air pollutant concentrates against the objectives set in the air quality regulations. I will take careful note of what she said and I am sure that the department will be aware of it, but I should tell the House that air quality is improving. Between 2010 and 2014, emissions of nitrogen oxides fell by 17%.