The document discusses the uncertainty in predictions of future global warming. The Intergovernmental Panel on Climate Change (IPCC) projects temperature increases between 1.5-6°C by 2100, but there is uncertainty regarding population growth, economic growth, energy use, and the climate system's response. Sea level rise is projected to be 0.2-0.8 meters by 2090s. There are also concerns about potential tipping points where small changes could trigger larger impacts, such as forest dieback increasing carbon emissions or melting Arctic sea ice reducing albedo. The Arctic is already experiencing impacts like sea ice and tundra retreat threatening ecosystems and indigenous peoples. Africa is also highly vulnerable to climate change impacts due to poverty