Electric scooters help riders escape Mexico City's gridlock, while reducing air pollution

Martin Vazquez glides silently through the pandemonium of rush hour in Mexico City, drives his sky-blue scooter up to a charging station and plugs it in.

When Vazquez, a 28-year-old professional, moved to the Mexican capital a year ago, he drove here by car. But the city's notorious traffic soon convinced him to sell it and look for ways to cut through the gridlock.