Climate change. That is the major challenge of the 21st century. Time is past where humankind thought it could selfishly draw on inexhaustible resources. We know now the world is not a commodity, it is not a source of revenue. It is a common good, it is our heritage. The consequences of Climate Change are fully known now. Were not talking about theories anymore. Were talking about certainties. If nothing is done, then we are talking about increasing temperatures for degrees by the end of the century. A need to stay below the threshold of two degrees. We are also fully aware of the consequences. It would mean we would certainly see the disappearance of many island states in the indian ocean and the pacific, and huge damage to the coastlines of all continents. The 25 cities that in 2015 had more than 10 million inhabitants 19 are located on the coastline. A huge number of individuals are directly threatened by the consequences of global warming. You can imagine the huge consequences that