The Port of Vancouver is the first in Canada to attempt to entice ships to burn cleaner fuels and lower greenhouse gas emissions. However an environmental group says it will take government regulation to truly stop cargo ships from burning the molasses-like bunker fuel in Canada's ports. The Vancouver program reduces harbour dues to ships burning cleaner fuel. The program ranks emissions at gold, silver and bronze levels. Darrell Desjardin, director of environmental programs with the Port of Vancouver, said the measure is a bridge to eventual international environmental shipping regulations. Desjardin isn't sure what kind of impact the program will have in reducing emissions in the area…