Chemical weathering involves the change in the composition of rocks, often leading to a 'break down' in its form. This is done through a combination of water and various chemicals to create an acid which directly breaks down the material.
Zimbabwe is often reported to have the highest adult literacy rate on the continent. A recent news article claimed that 90% of the population is literate. The data does not back up the claims. Researched by Kate Wilkinson.
Mali has one of the lowest literacy rates in the world, at 33.4%, with males having a 43.1% literacy rate and females having a 24.6% literacy rate. The government defines literacy as anyone who is at least 15 and over who can read or write.