Research on global emissions of greenhouse gases and air pollutants: sources, trends, reduction options, scenarios. Analysis of environmental aspects of biofuels and biomass.
Collaborator and adviser of the global emission inventory project ‘EDGAR’, formerly a joint JRC/PBL project. In 2011, detached national expert at the Joint Research Centre (JRC) of the European Commission in Ispra (Italy)
Contributor to the Netherlands National Inventory Report on Greenhouse Gas Emissions. Advisor to the Environment Ministry on greenhouse gas emission methodologies.
Expert Reviewer for the Netjherlands of national reports submitted to the UN Climate Convention (UNFCCC) and Kyoto Protocol.
Lead author for the 2006 IPCC Guidelines for Greenhouse gas Emission Inventories. Contributing author to the Fourth Assessment Report of IPCC Working Group III.
Lead author of the Fifth Assessment report of IPCC Working Group III (on Mitigation) and Chair of the Data Task Group of Working Group III.
Scientific contact person for press questions and other media contacts on CO2 emissions.