IGBP, WCRP and a third programme, the International Human Dimensions Programme (IHDP, founded in 1996), spearheaded a landmark science conference held in Amsterdam in 2001. The conference, "Challenges of a Changing Earth: Global Change Open Science Conference", led to the Amsterdam Declaration which stated, "In addition to the threat of significant climate change, there is growing concern over the ever-increasing human modification of other aspects of the global environment and the consequent implications for human well-being. Basic goods and services supplied by the planetary life support system, such as food, water, clean air and an environment conducive to human health, are being affected increasingly by global change."