Paris will no longer take your breath away. Its monuments, avenues and restaurants might, of course, but Mayor Anne Hidalgo is pledging its pollution won’t. The city, host to the COP21 United Nations climate conference last year, will ensure the French capital’s air is cleaner and that its citizens have a healthier environment, she says. Starting July 1, cars registered before October 1997 and motorcycles registered before June 1999 will be barred from the city’s…