How you can make a difference

■ The official advice in the Government’s clean air strategy includes the recommendation to use unperfumed cleaning products to minimise indoor pollution.

■ Be wary of lime and pine fragrances, which can react with indoor air and form harmful chemicals like formaldehyde.

■ Have fewer garden bonfires, especially if you live in an area of poor air quality. ■ Buy things online in one go, so they all arrive together and fewer van deliveries are needed.

■ Turn your thermostat down to reduce domestic fuel use, or insulate your house properly.

■ Walk or cycle along quieter routes to avoid traffic fumes.

■ When changing your car, pick a more green model, preferably electric.

■ Open your windows and let in fresh air to ventilate your home.