Attitude to industrial expansion and the pollution in the Rijnmond area / participation / opinions on local government policy, municipality of Rotterdam versus the Rijnmond Raad / attitude to protest and action groups / in second wave additional questions about personal trouble / complaints / fears / sense of efficacy of protest actions / in third wave additional questions on personal experiences / attitude to agencies that take actions / action groups / specific companies / evaluation of actions taken to diminish pollution. Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ education/ social class/ politics/ religion