Considered the world's most advanced sun-powered plane, the Solar Impulse took off from Moffett Field in Mountain View at first light for a two-hour practice run in advance of a planned multi-city, cross-country tour.

WSJ: Sun-powered plane completes California test flight

Combined-cycle gas turbines, which use hot exhaust gases from one turbine to generate steam to turn a second one, can transform 6, 800 Btu of gas into a kilowatt-hour of electricity, enough to light one lightbulb for ten hours.

FORBES: Indigestion

Every day from the week of July 6, special reports will appear on CNN International, culminating in a half-hour special "Going Green: Green Light for Business" which airs from July 9 (see below for show times).

CNN: 'Going Green' with

Susan White Mathis, a native of Atlanta, had long been in search of a place to build an African retreat, and after an extensive search, she settled on Madikwe Game Reserve, a 185, 000-acre tract of arid bushveld located an hour by light aircraft northwest of Johannesburg.

FORBES: South Africa's Opulent Mateya Safari Lodge

Sitting in her home in waning light, she is filmed in fixed-focus shots (the first one runs an hour and keeps running even when she gets up to go to the bathroom).

NEWYORKER: Fengming: A Chinese Memoir