In an increasingly urban world, trees can make a major difference. One study found that, for every dollar invested in planting, megacities saw a $2.50 return on their investment.
Recent urban disasters in Ethiopia and Mozambique resulted in high female mortality, which was been largely ignored.
The vitality that defines central Melbourne today did not emerge overnight. Rather than being born of one grand vision, it's the result of many astute, incremental changes that revitalised the city.
Understanding population density takes more than just arithmetic – that's where mapping can help reveal which countries and cities are really getting cramped.
Low-density suburbs can cause social isolation that's harmful for individual and community well-being. But research confirms we can plan neighbourhood centres so they become vibrant social hubs.
Movies often portray the city as a dystopia, particularly in the 'neo-noir' genre, which explores postmodern themes. TV shows and ads present an altogether sunnier picture of life in the city.
Millions of Americans rely on public transit to get to school, work or stores, but many can't get the service they need. 'Uberizing' transit by offering more options on demand could fill the gaps.
The physical segregation of cities has a crucial role in poverty and access to public services.
Coffee and sex are both highly marketable commodities. But who would have thought that the capital of one of Latin America's most socially conservative countries would combine them in its cafes?
Research shows tranquility can help to boost levels of relaxation, reduce stress and even provide pain relief.
Research shows planners and built environment professionals have surprisingly poor knowledge about how cities might harm mental health. The good news is that simple steps can make a big difference.
Many Americans live in transit deserts – areas where demand for transit exceeds the supply. To fix these gaps, we need to find and map them so agencies can add transit options in the right places.
In an urbanizing world, people increasingly are seeking out nature in cities. Research shows that diverse species of animals, plants and insects can thrive in areas that humans have altered.
When wealth accumulation becomes the driver of urban regeneration, residents who already have little or no say in the future of our cities are further marginalised by gentrification.
Communities have an increasing desire to be informed and included in local art, design and infrastructure projects. This has inspired new ways of dealing with noise-afflicted areas.
Pollution, poverty, disease and death: future cities will be grim places, unless we do things differently.
Over the past 15 years, community groups in a rundown inner-city district have created public murals as part of a successful process of reversing decades of stagnation.
Toxic industrial processes put a distance between work, home and leisure. Now, in the post-industrial era, these functions are being reunited.
In contrast to perceptions of other homeless people sleeping rough, Darwin's "long-grassers" are applying a long cultural tradition to deal with the situation in which they find themselves.
Hillary Clinton and Donald Trump have painted starkly different views of U.S. cities during the campaign. Will the next president deliver the funding and political support mayors are seeking?