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.
The rate of literacy increased more rapidly in more populated areas and areas where there was mixture of religious schools. The literacy rate in England in the 1640s was around 30 percent for males, rising to 60 percent in the mid-18th century. In France, the rate of literacy in 1686-90 was around 29 percent for men and 14 percent for women, it increased to 48 percent for men and 27 percent for women.