Although an economic boon, tourism can be a destructive force for the environment. Israel, filled with religious tourism destinations, is exploring ways to make pilgrimages sustainable.
In impoverished areas, people spend $1 to $2 per day to burn charcoal or wood to cook food, a huge expensive for them. A clean-burning cookstove cuts that cost by more than half.
High oil prices are good for oil exporters while low oil prices are good for oil importers, Tverberg writes. The result is a price tug of war between oil importers and oil exporters.
South Africa, Nigeria, Angola, Ghana, and Ethiopia all have economies that are growing at a brisk pace. But their future depends on how they invest that money, writes Matthew Hawkins.
Africa is the fastest-growing market for cellphones in the world, and they're increasingly being used to power the continent's educational breakthroughs.