Artaxo is professor of environmental physics at the Institute of Physics, University of São Paulo (USP), Brazil. He obtained his MSc and PhD in physics also at USP. He has previously worked at NASA, Harvard University (USA), University of Antwerp (Belgium) and Stockholm and Lund Universities (Sweden). His main interest is in global climate change with a focus on the role of aerosol particles in the radiative balance as well as on environmental issues in Amazonia. He is a member of the Brazilian Academy of Sciences, fellow of the American Association for the Advancement of Science and member of the IPCC. He has been honored on several occasions: In 2004 he received a Senate vote of approval for his Brazilian scientific work on Amazonian environment, and awarded a Doctor of Philosophy Honoris Causa in 2009 at the University of Stockholm, Sweden. He is one of the most cited Brazilian researchers with more than 390 papers, with more than 29,000 citations.