Shell Downstream. Shell Downstream is one of the worldâs largest businesses in the production and. distribution of petroleum and chemical products. In 2003, Shell embarked upon a radical change to its business model from a country centric approach to a global product line. basis.hell Downstream. Shell Downstream is one of the worldâs largest businesses in the production and. distribution of petroleum and chemical products. In 2003, Shell embarked upon a radical change to its business model from a country centric approach to a global product line. basis.
The Carlton Centre is a 732 ft or 223 meter tall building in Johannesburg, South Africa. It has been the reigning champion of tallest buildings in Africa for 39 years to this point.
At its height, in the 14 th century, Kilwa Kisiwani was the single most important trading centre on the East African coast and its ruins include a number of mosques, a well-preserved Omani fortress, graves, and the remnants of a Great Palace that was, in its day, the largest permanent building in sub-Saharan Africa.