Solar panels shine on the rooftop terraces of 10 neat buildings with perfectly straight lines and of uniform height, an image of modernity that contrasts with the precariously-built dwellings with unplastered concrete block walls just a few metres away, with rooms added in a disorderly manner, surrounded by a tangle of electric cables.
Sustainable transport grew in the Latin American cities of Buenos Aires, Mexico City and Rio de Janeiro in 2013.
A new system of exclusive lanes for bus rapid transit appears to be benefiting public transport passengers and bus drivers in the most congested part of the centre of the Argentine capital.