Thus we see the Earth at night. Lights delimit more developed and highly populated areas from the rest. The central part of South America, Asia, Africa and Australia "highlight" as the darkest areas.
Some quick facts for a better understanding:
Each day, NY city consumes the same amount of electricity as all Sub-Saharian countries combined excluding South Africa. In other words, these means that the almost 20 million inhabitants of NY consume in a year the same as almost 800 million people of Sub-Saharian countries, that is, about 40 TWh. It is obviuos to say that Africa has the lowest per capita energy use of any continent.
In 11 contries in Africa, more than 90% of people live completely without electricity. That means about 600 million people throughout the continent.
These 600 million are part of the 1.5 billion people worldwide without access to electricity (about 25% of the global population)
85% of these people live in rural areas.
Without additional dedicated policies, by 2030 the number of people without access to electricity is estimated to drop, but only to 1.2 billion. That would mean that still 15% of world's population would lack access to electricity
Source: World Energy Outlook 2010