We walked out the door to our quaint little basement AirBnB apartment to a sunny day and gorgeous blue skies, to one of the main streets of Cuenca, Ecuador, Remigio Crespo. From the crisp, clean air of the apartment, we waded into a cloud of fumes, from diesel buses, two-cycle motorcycles, and cars. We were enveloped in the smoke, fumes, and the noise of traffic.