He led the TAPAS (active transportation and health) and PHENOTYPE (green space and health) studies and participates in the ESCAPE (air pollution and health), HELIX (exposome and health), EXPOsOMICs (exposome and health) and PASTA (active transportation and health) studies.

He currently participates in the iMAP (Urban environment and cognition), BlueHealth (Bluespace and health), Lifecycle (Birth cohorts) and CitiesHealth (Citizen science and health) studies.

He has edited three books on Exposure Assessment and on Environmental Epidemiology, and one on Integrating human health into Urban and Transport planning, one on Transportation and Health and has co-authored more than 450 papers published in peer reviewed journals and 35 book chapters.

In 2018, he was awarded the ISEE John Goldsmith Award for Outstanding Contributions to Environmental Epidemiology. In both 2018 and 2019, he was among the 1% most cited scientists in the world.