At this morning’s Newsmaker “Thriving in the New Global Economy,” Alcoa CEO Klaus Kleinfeld and McKinsey Global Managing Director Dominic Barton told Chrystia their outlook for the world economy. From his perch atop one of the world’s leading aluminum producers, Kleinfeld was “really positive” about global growth prospects. Coming off a strong year in which aluminum demand rose 13 percent, the Alcoa chief forecast that aluminum demand will grow at a slightly slower rate of 12 percent this year thanks to China’s efforts to slow down its economy: