New directions : cleaning the air : will the European Commission's clean air policy package of December 2013 deliver?

NOTICE: this is the author’s version of a work that was accepted for publication in Atmospheric Environment. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Atmospheric Environment, Volume 91, July 2014, DOI 10.1016/j.atmosenv.2014.04.027. Eligibility for repository : checked 30/05/2014