It turns out that greenhouse gases may not just be causing temperatures to rise. They're also responsible for the rainfall in Africa. Scientists have found that a period known as the African Humid Period that began after a long dry spell could potentially be blamed on greenhouse gases.
The African Humid Period lasted nearly 10,000 years and occurred just after the end of the last ice age. During this time, cumulative rainfall was extremely high. Yet exactly what caused this rainfall has remained a mystery for years.