[areli carreon] this is real mexico. it's not for tourists. it's not the beautiful face that most politicians like to show. it's real mexico. this is a city, a big, humongous city, that hasn't lost its human scale. we have built the city over its ancient layers, like an onion, you know? yeah. here, all the centuries live together. here, you can find people living in the ancient aztec times, with the way they think, they eat and they behave. and at the same time, you can meet mexicans of the future, you know? people who speak a lot of languages, have travelled a lot, have new ideas. the two are mixing, they're living together. - areli carreon, co-founder of bicitekas, an activist group hoping to spread the good word about the necessity of urban cycling. after living abroad, she decided she wanted to raise her two children here, in her hometown... well, her home metropolis, despite the countless challenges that it faces. how do you identify the most important issue of the city right now? the problem that somehow embodies it all is inequality. bu