Before its coast-to-coast American trip, the Solar Impulse will take test flights around the San Francisco Bay Area in April, officials said.

WSJ: Solar plane plans stops in Phoenix, Dallas, NYC

Speaking of sun-powered planes, the Solar Impulse just made its final test flight around the San Francisco Bay Area before embarking on a cross-country voyage next week.

ENGADGET: Inhabitat's Week in Green: flying electric car, 3D-printed livers and a two-story-tall bike