Climate change is "relentlessly eating away" Africa's economic progress and it's time for a global conversation on a carbon tax on polluters, Kenya's president declared on Tuesday as Africa's first summit on the climate . "Those who produce garbage refuse to pay their bills," summit host President William Ruto told an audience that included senior officials from China, the United States and the European Union - some of the world's biggest greenhouse gas producers. gases. The fast-growing African continent of more than 1.3 billion people is losing between 5 and 15 % of its gross domestic product growth every year due to the widespread impacts of climate change, according to Ruto. It is a source of deep frustration in a resource-rich region that contributes by far the least to global warming. (CARA ANNA)