Reuters: The haze blanketing Beijing lifted slightly on Tuesday although the sun was obscured by grey skies three days before the opening ceremony of the Olympic Games Organisers want clean and crisp skies for the Games and have closed factories and pulled half the capital’s 3.3 million cars off the roads to achieve their ambition. They are holding in reserve further plans to reduce the number of cars on the roads and shut more factories, if projections show unacceptable conditions in …