Projections for the urban world have been updated. In May, the United Nations released a new edition of the World Urbanization Prospects, a report that takes an in-depth look at the planet's urban centers, concluding that 68% of the world's population will live in cities by 2050. This estimate is 2% higher than the previous study published in 2014, which is part of the series produced by the United Nations Department of Economic and Social Affairs (DESA).

Few cities worldwide have had the courage to tax vehicle circulation—even though existing examples have, so far, been positive. It has fallen to Buenos Aires to launch the first policy of this kind in Latin America. Starting now, the city government will charge for the time saved by those who insist on driving in the historic center (known as Microcentro) of the Argentine capital and in the Retiro neighborhood between 11 a.m. and 4 p.m. The city joins a list whose prominent names include Singapore, London, Stockholm, and Milan.