In China, Beijing and its adjacent area have issued an orange alert for heavy air pollution which looks set to linger for the next three days. <br/><br/>The orange alert, the second highest in the four-tier warning system, came into effect from last night in Beijing. The capital is forecast to see serious air pollution from today to Saturday.<br/><br/>Beijing Vice Mayor Zhang Gong ordered implementation of full emergency measures, including restrictions on coal burning, production and heavy trucks.<br/><br/>The smog is expected to disperse Sunday when a cold front is forecast to arrive in north China.