Reuters: Half of Paris' streets and avenues were car-free on Sunday as part of Mayor Anne Hidalgo's fight against air pollution, allowing families and tourists to wander on the roads around landmarks such as the Eiffel Tower and Champs-Elysees. The car ban covered a larger part of the city than last year's event, closing off more than 650 km (400 miles) of roads in the French capital and offering attractions such as skating sessions and a picnic on the banks of the Seine near city hall. For Socialist mayor...