London School of Hygiene and Tropical Medicine (LSHTM): Centre on Global Change and Health
This LSHTM centre collaborates on projects with the WHO and is the hub for several projects on the health effects of climate change. There is little in the way of background information but the site distils the key points and offers summaries of its own research.
One project looks at the global burden of disease associated with climate change, another is doing a multi-sectoral assessment of the worldwide impact of climate change. LSHTM researchers have published extensively on health and climate change — they were among the first in the world to do so — and the site contains a useful list of these publications.