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.
Nigeria, with 11 million Internet users, has the largest online population. Of the sub-Saharan African countries discussed in this profile, Zimbabwe (the one non-island nation to break the 10 percent threshold) has the highest penetration rate at 10.5 percent, followed by Uganda (7.8 percent) and Nigeria (7.26 percent).ote: a previous version of this profile is available at Sub-Saharan Africa, 2006-2007. The OpenNet Initiative also presents individual reports for the following countries in the region: Ethiopia Nigeria Uganda Zimbabwe.