This paper describes a simulation study of some of the socio-economic consequences of a rise in sea level on Dutch society. A computer simulation model for the greenhouse problem has been developed, which tries to capture the climate change cause-effect relationship for a combination of greenhouse-gas emissions. The impact of emissions of greenhouse gases on global temperature and sea-level rise can be calculated using the model. Additionally, separate, independent modules have been implemented in order to quantify the socio-economic consequences for the Netherlands. Four consistent sets of scenarios have been developed, based on differences in economic growth, energy use, international environmental measures, etc. On the basis of these scenarios estimates are made of the costs of coastal defence and water management in the Netherlands as a result of adaptation to the impacts of sea-level rise.