WINNIPEG, Manitoba - Global Grain Group (G3), which is taking control of grain handler CWB, has agreed to acquire a long-term lease at Port Metro Vancouver, paving the way for the first new grain terminal in nearly 50 years at Canada's busiest port, according to a source familiar with the matter. The high-efficiency grain terminal would cost roughly C$500 million ($400 million) and ramp up competition in the world's No. 2 wheat exporting...