The African Union (AU) expects to officially join the Group of 20 (G20) nations this month, providing the continent with another seat at the table with some of the world’s biggest polluters as it confronts the fallout from global warming. The continental group aims to use the opportunity to call on rich nations to honor their promises to tackle climate change, including providing developing countries with $100-billion in financing each year, said Macky Sall, the President of Senegal who holds the AU’s rotating chairmanship. G20 nations are responsible for 80% of global emissions, while Africa accounts for less than 4%.