Reuters: Beijing’s city authorities have raised pump prices by up to 4 percent to cover the cost of cleaner fuel, a bold gesture of support for efficiency and green growth on a day when global oil markets hit an eight-month low. China’s central government has for years ignored rising oil markets to hold down state-set diesel and gasoline prices — and protect demand growth — out of fear costlier energy could feed inflation or social unrest. But if the capital of the world’s No. 2 two …