An overview of the intergovernmental panel on climate change (IPCC) and its process of science assessment / John Houghton -- A perspective on global air pollution problems / Johan C.I. Kuylenstierna, W. Kevin Hicks and Michael J. Chadwick -- Influence of climate variability and change on the structure, dynamics and exploitation of marine ecosystems / Manuel Barange -- Rising sea levels : potential impacts and responses / Robert J. Nicholls -- Climate change, global food supply and risk of hunger / Martin L. Parry and Matthew T.J. Livermore -- Global environmental changes and human health / Michael V. Ahern and Anthony J. McMichael -- Corporate environmental performance / Frans Berkhout