Dear Priscilla,
A pleasant day to you and to your collegues, and to all subscribers of this famous site, the Expat.Blog.
For me, the best business development in Angola is a JUNK SHOP. A Junk shop is a place or a shop wherein every little things have monetary values, and at the same time, they can recycle those things.
Let me give an example.Those old and broken cars that i had seen, and no one cares about, if you put in junk shop, they will weigh it and will pay you.Another is the plastic bags or carton, or paper, instead of throwing it that created dirty roads and clogges, when put in junk shop, again, they will weigh and will pay you.Like in japan, everything have values when put in junk shop. They recycle everything.That way, it will create a better environment and a clean surroundings.