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.
Angola (0.685 EDI) Tenth on the list with an Education Development Index of 0.685 is Angola. With the highest Adult Literacy Rate (ALR) on this list of 70.1%, Angola still clearly stands head and shoulders above its continental compatriots on this list.