Plenty Magazine has a piece about the race to build a suborbital rocketship that is a green, or at least one that is “environmentally benign” – whatever that means. Eliza Strickland interviews XCor’s Doug Graham and Virgin Galactic’s Stephen Attenborough about their companies’ efforts. “[Xcor] built a small, two-seated vehicle powered by kerosene and liquid oxygen, which burns cleanly at about 6,000°F and emits no smoke or particulate matter,”  Strickland […]