1. Molina Center for Energy and the Environment, La Jolla, CA, USA
2. Instituto Tecnológico de Monterrey, Monterrey, Mexico
3. Universidad Nacional Autónoma de México, Mexico City, Mexico
4. Instituto Nacional de Ecología y Cambio Climático, Mexico City, Mexico
5. Ambientalis, Mexico City, Mexico
6. California Air Resources Board, Sacramento, CA, USA