Pape Sakho, Université Cheikh Anta Diop de Dakar; Gaele Lesteven, École nationale des travaux publics de l'État; Momar Diongue, Université Cheikh Anta Diop de Dakar, and Pascal Pochet, École nationale des travaux publics de l'État
Urban expansion in Sub-Saharan Africa and the need for daily mobility
Quite how to gauge the size of a city – or where one ends and the next begins – is getting harder to determine. The 21st century belongs to the limitless city.
Since he was elected in 2018, Doug Ford and the Progressive Conservatives have made big changes to the province’s environmental policy, which some say are are harmful to endangered species and aren’t aligned with the fight against climate change.
THE CANADIAN PRESS/ Geoff Robins
Kabila Abass, Kwame Nkrumah University of Science and Technology (KNUST) and Kwadwo Afriyie, Kwame Nkrumah University of Science and Technology (KNUST)
Policies should protect arable land from urban encroachment and make peri-urban households less vulnerable.
Before the pandemic, the country was making great strides towards creating more compact, sustainable and liveable cities.
Cities are going to be reshaped by the coronavirus pandemic, which has closed public parks, decreased traffic and put pressures on housing.
(Nathan Shurr/Unsplash)
The demands on land and resources from our fast-growing cities are unsustainable, as are the wastes they produce. Yet still our leaders act as if unlimited growth is possible.
On Akure’s edges, which used to be mainly farmland, buildings are taking over.
Author supplied
City officials have not considered how approaches like mixed-use developments closer to the city centre might alleviate the housing shortage as well as protect Akure’s green spaces.
Human-built structures are home to a wide variety of creatures.
When we build marinas, ports, jetties and coastal defences we introduce hard structures that weren’t there before, and which reduce the amount of sunlight hitting the water.
As one of the fastest-growing cities in the developed world, Melbourne’s suburban sprawl has many costs.
Nils Versemann/Shutterstock
John Stanley, University of Sydney; Janet Stanley, The University of Melbourne, and Peter Brain, National Institute of Economic and Industry Research
State and local governments can’t do much about the rapid population growth in Melbourne, but they can take steps to reduce the costs of growing disparities between the outer suburbs and inner city.
About two-thirds of Australia’s strawberries are grown on the fringes of Melbourne and Brisbane.
Xavier La Canna/AAP
City fringe foodbowls supply much of our fresh produce and can increase climate resilience by making better use of wastewater and organic waste. A new roadmap outlines how to protect these foodbowls.
Australia’s sprawling cities present many challenges to sustainability, but planning innovations can help achieve at least half of the UN Sustainable Development Goals.
Nils Versemann/Shutterstock
Planning innovations around the world offer inspiration, but ultimately the innovations needed to make Australia’s sprawling cities more sustainable must be shaped by local conditions.
City fringe agriculture gives farmers unique access to direct markets and provides those living in cities the opportunity to connect with local growers.
Foodprint Melbourne
To improve access to locally grown food and help prevent disruptions to supply chains caused by climate change, we need to support farming on the fringes of cities.
Calgary beat out Vancouver on this year’s most livable city index issued by the Economist magazine.
Flickr
Vancouver lost out to Calgary as Canada’s most livable city this year. Why? Is it the high cost of housing or is it the city’s ‘neighbourhood first’ method that sometimes creates business instability?
Residents of Pandanad sit in a bus stop surrounded by flood waters, in Kerala, India.
Manjunath Kiran/AFP
Uncontrolled growth at the expense of the environment will severely exacerbate the impacts of climate change. As shown with tragic floods in India, our cities are not prepared for extreme events.
Garden roofs (like these in Chengdu, in China’s Sichuan province) need maintenance and community involvement.
from shutterstock.com
Dense, high buildings limit the space available for urban greenery. But imaginative projects that involve the community can ensure nature and the city go hand in hand.
Four major disruptions of urban transport are set to transform city life, but exactly how remains uncertain.
Taras Makarenko/Pexels
Self-driving, shared, electric vehicles and increasing urban density represent four disruptions that will transform city life. But a transport utopia isn’t a guaranteed outcome of their interactions.
Wildfire threatens a home near Possum Kingdom, Texas, April 19, 2011.
State Farm
Many countries around the world are vulnerable to wildfires, but a fire engineer warns that most are not spending enough on research into how fires spread and ways to reduce risks.