by Xinhua writer Liu Shuchen BAKU, Aug. 3 (Xinhua) -- "When I began driving electric buses, I could immediately tell that they were very different from the buses I had driven before. They run quietly and smoothly, with hardly any noise or vibration. Most importantly, they are environmentally friendly," said Nurlan Salmanli, a 34-year-old bus driver in Baku. Salmanli previously drove buses powered by compres