plus, the cost of the vehicl toooo higfor mamany nononetheless, t the number ofof electricic vehles isiso hit 40 million by 2025. not soon enough for some of ee morere gre-mindeded tizens o o mexico. >> it's clear weather, but a blanket of smog lies over mexico city. 5 million cars travel through the vast urban center every day. even though the bad air is palpable, it seems no one here wants to give up driving. >> so many cars -- too bad they pollute so much. >> and why don't you have an electric car? >> my husband realally wants o buy one. hopefully we c can get one soo. >> there's not enough choice. >> they're too expensive. >> thehere are too few chargig stations. >> but where there's a will, there's a way. hector ruiz has packed 14 batteries under the hood of his converted electric vw w beetl. we're taking i it out for a sp. the car's quiet hum is quickly drowned out as we dive into rush hour in the mexican capital and are engulfed in exhaust fumes. >> i even had to go to a specialist because i developed an asthma problem, because i've been living in such a poisonous city for 15 year