The Global Development And Environment Institute is pleased to announce a new paper available on its web site: “Dirt is in the Eye of the Beholder: The World Bank Air Pollution Intensities for Mexico” by Francisco Aguayo, Kevin P. Gallagher, and Ana Citlalic González, written in collaboration with the Science, Technology, and Development Program (PROCIENTEC) at the Colegio de Mexico. This paper, along with others in the working paper series, is available from the home page of our web site.