 Ward's book "Only One Earth" (co-authored with René Dubos), was the key text for delegates at that conference, where Ward introduced the term sustainable development to a global audience and highlighted the links between the environment and human wellbeing.IIED carried out research and lobbying work on a range of contemporary environment and development topics, using funds obtained from donor organisations and occasionally from corporations and foundations.It held its first symposium at the 1974 UN World Food Conference and in 1975 joined forces with UNEP to create Earthscan, an information and environment service for media.