Last year marked an important tipping point: for the first time, half of the global population lives in cities. Cities currently add 1.4 million people each week and this population growth comes with new buildings, roads and transport systems.
In fact, 75 percent of the infrastructure that will be in place by 2050 does not exist today. With cities poised to invest now in infrastructure that will last for decades, huge opportunities lie ahead. But without major shifts now in how we manage established as well as rapidly growing cities, we risk losing out on the potential of urbanization to create more inclusive and prosperous societies.
2015 offers a big chance for the international community to help put cities on a more sustainable path. We at the World Bank and the World Resources Institute (WRI) believe that we must seize this opportunity, because cities and urban mobility are key to a sustainable future.
Business-as-usual urbanization patterns come at a hefty price. Cities already produce 70 percent of energy-related greenhouse gas emissions and traffic crashes claim 1.2 million lives per year, with developing cities carrying the greatest burden.
Traffic congestion cost Rio de Janeiro and São Paulo a combined $43 billion in 2013 alone, equivalent to 8 percent of each city’s GDP. In Beijing, the costs of congestion and air pollution are estimated at 7-15 percent of GDP. Urban sprawl costs the United States alone $400 billion per year.
This is not the future we want for our cities.