Historically, throughout the African continent, wildlife populations have been rapidly declining due to logging, civil wars, pollution, poaching, and other human factors. A 17-year-long civil war, along with severe drought, negatively affected Ethiopia's environmental conditions, leading to even greater habitat degradation. Habitat destruction is a factor that leads to endangerment. When changes to a habitat occur rapidly, animals do not have time to adjust. Human impact threatens many species, with greater threats expected as a result of climate change induced by greenhouse gases. With carbon dioxide emissions in 2010 of 6,494,000 tonnes, Ethiopia contributes just 0.02% to the annual human-caused release of greenhouse gases.