Over the past 10 years the International Association of Oil & Gas Producers (OGP) has collected environmental data from its member companies on an annual basis. The objective of this programme has been to allow member companies to compare their performance with other companies in the sector, leading, it is hoped, to improved and more efficient performance. The programme also contributes to the industry’s wish to be more transparent about its operations. This report summarises information on exploration & production activities carried out by contributing OGP member companies in 2008. 32 member companies (5 more than last year), working in 62 countries worldwide, have submitted data for the report. Three companies are taking part for the first time, three companies that have contributed data in previous years but not in 2007 have returned to report 2008 data, and one company that reported last year did not take part this year. Information is aggregated at both global and regional levels and is expressed within 5 indicator categories: Gaseous emissions Aqueous discharges Non-aqueous drilling fluids (NADF) on cuttings Spills Energy consumption and flaring.