... Health Organization, Geneva, Switzerland.- G. Killeen, Ifakara Health Research and Development Centre, Ifakara, Tanzania.- T. Kjellstrom, Australian National University, Canberra, Australia.- ... toreadily modifiable environmental factors, such as land use, irrigation and agriculturalpractices. Diarrhoeal diseases associated with a lack of access to safe drinking-water and inadequatesanitation ... from malaria, and over a quarter of a million people die from HIV/AIDS, as a result of environmental and occupational causes. A large proportion of malaria, in particular, may be attributable...