It was while taking part in the working sessions of the scientific community, which met in Monaco last October for the second international symposium The Ocean in a High-CO2 World, that I expressed my earnest wishes for the Monaco Declaration to be drafted. The seas and oceans absorb onefourth of the carbon dioxide emitted to the atmosphere from human activities, which in turn is driving their acidification at a rate that is unprecedented. This chemical modification will alter marine ecosystems, upon which over half of the world’s population depends for its primary source of food. This declaration, based on irrefutable scientific findings and signed by 155 scientists from 26 nations, sets forth recommendations, calling for policymakers to address this immense problem. I strongly support this declaration, which is in full accord with my efforts and those of my Foundation to alleviate climate change. I hope that it will be heard by all the political leaders meeting in Copenhagen in December 2009. H.S.H. Prince Albert II