This article provides a brief overview over some of the main findings in the most recent IPCC WG I report and in articles published after the report. It is argued that the conclusions in the report on observed climate variations and trends during the last 100 years have been largely confirmed or even reinforced by the most recent studies. Concerning future climate change, new analyses of possible changes in sea-level, which take melting land ice into account, indicate that the global sea level may rise as much as one meter within the present century.