USA Today: "The missing ingredient is the force of public opinion." That’s the line Cathy Zoi recalls from former vice president Al Gore when he urged her to become CEO of the Alliance for Climate Protection. Americans are aware of global warming, "but they don’t get the urgency of it and that this is solvable," says Zoi, who took the job last year. The new group is about to launch the most ambitious U.S. marketing campaign ever on climate change, at a cost of …