Lighten up

This manipulated photograph, showing the world at night, provides ample evidence of the need for a better power supply in developing nations. Since the 1970s, improvements have been made to bring electricity to countries in Latin America, Asia and the Middle East, but so far Africa has lagged behind with only 25 percent of the population having access to electrical power. The World Bank is expecting a big power surge over the next decade, especially in Africa and South Asia.