Each week our friends at Inhabitat recap the week's most interesting green developments and clean tech news for us -- it's the Week in Green. As the race to develop new, more efficient modes of transportation heats up, it could soon become even easier (and greener) to jet around the globe. This week saw the Solar Impulse -- that broad, funny-looking airplane -- complete the world's first solar-powered intercontinental flight. Meanwhile, Boeing's hydrogen-powered '
