Clean Air Zones are part of a range of measures to improve air quality as set out in the revised national air quality plan for nitrogen dioxide, published in December 2015.
The national air quality plan for nitrogen dioxide sets out a comprehensive approach to improving air quality and reducing impacts on health. It recognises the use of alternative fuels such as liquefied petroleum gas and liquefied and compressed natural gas and where appropriate it presents opportunities to improve emissions from vehicles. The plan sets out some of the measures we are taking to support innovation in this area.
The Government continues to review evidence concerning the environmental impact of alternative fuels, with any changes to the tax treatment of alternative fuels announced at fiscal events.