Speaking around gulps of carbonated, corn-syrupy beverage, Coca-Cola executives announced two environmental initiatives this week. By next year, the company plans to redesign its 20-ounce bottle to use 5 percent less plastic, and will open a gigantic recycling plant in South Carolina. Coca-Cola currently recycles or reuses about 10 percent of its U.S.-sold plastic bottles; the company hopes to raise that number to 30 percent by 2010, and has a long-term goal of not contributing to the U.S. plastic waste stream at all. But when can we expect to see Coca-Cola Green, hued with organic food coloring?