The trade relationship between the United States and Africa, as well as the African Growth and Opportunity Act (AGOA) - which provides exporters duty-free access to the lucrative U.S. market - was recently put under the microscope at the U.S.-Sub Saharan Africa Trade and Economic Cooperation Forum, which coincided with President Barack Obama's U.S.-Africa Leaders Summit, both held in Washington last week.

DHL Express has introduced a "carbon-neutral" envelope for U.S. customers.