Mayor Bloomberg is ramping up his international antitobacco campaign by pumping in an additional $250 million and by teaming up with a former chairman of Microsoft, Bill Gates, who is contributing $125 million to combat tobacco use. The funds will target smoking in the developing world, with an emphasis on China, India, Indonesia, Russia, and Bangladesh. Mr. Bloomberg's funding will support projects that seek to raise taxes on tobacco, promote negative images of smoking, help people quit... ...