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 country with the highest estimated maternal death rate (in 2013) was Sierra Leone, in West Africa, at 1,100 deaths per 100,000 live births. The European Union, the United Nations Development Program, the United Nations Population Fund and the United States Agency for International Development financed the Zimbabwe survey, which researched 17,000 households in every province of the country.