UK environmentalist George Monbiot: "We have to overthrow this system which is eating the planet: perpetual growth," Monbiot declared. And the writer pulled no punches. Annual economic growth targets of 3% represent "madness," he said. The columnist reached his crescendo. "We can't do it by just piddling around at the margins of the problem; we've got to go straight to the heart of capitalism and overthrow it."