Cities
Articles tagged with Cities
Biomonitoring the Anthropocene: NY's East River becomes a living biosensor
A year-long study of NYC's East River used environmental DNA to reveal insights into urban wildlife activity, human food consumption and ecosystem health. The findings suggest that urban waterways can become continuous biosensors tracking biodiversity and habitat restoration outcomes.
Whether traffic flows or not depends on more than just the roads
A study by ETH Zurich and the University of Wisconsin found that urban development and transport are mutually dependent and have cause-and-effect relationships. The researchers correlated congestion data with city characteristics, such as road network structure, green spaces, and urban function.
Green alley effectiveness depends on design and purpose, Concordia-led study finds
A Concordia-led study analyzed 53 green alleys and 23 conventional alleys in Montreal and Trois-Rivières, finding that results depend on alley design and purpose. The study suggests a middle ground between community-led projects and standardized approaches to achieve both biodiversity and social cohesion.
Road infrastructure and traffic affect community members’ mental health, study finds
A study by Brown University and Columbia University found that road infrastructure isolates communities, leading to increased schizophrenia-related hospital visits. The Community Severance Index measures physical and social disconnection using roads, traffic, and lack of pedestrian infrastructure.
Post-pandemic cycling boom in major cities, as cyclist safety improved thanks to more and better cycling infrastructure
A new study reveals a post-pandemic cycling boom in major cities, with fatality rates dropping by up to 88% in Paris, 82% in London, and 62% in New York City. The improvement is attributed to the expansion and improvement of cycling infrastructure, including cycleways separated from motor vehicle traffic.
UT Arlington professor examines rise of global megacities
The book analyzes Jakarta through the lens of post-suburbanization, highlighting how rapid expansion, infrastructure politics, spatial fragmentation, and socio-environmental challenges shape its growth. The volume provides a comprehensive English-language analysis of Jakarta's contemporary urban evolution.
Waikīkī faces escalating threat of sewage-contaminated flooding as sea level rises
A new study reveals that Waikiki is facing a fundamental shift in flood hazards as sea levels rise, transitioning from rainfall-driven floods to tidal process-dominated events. The team identified two key pathways, storm drain backflow and groundwater emergence, which will increase public exposure to sewage-contaminated waters.
Concordia research simplifies method for estimating climate impact of reflective surfaces
A new study by Hashem Akbari offers a simplified way to calculate the climate impact of reflective surfaces, allowing policy practitioners to view problems on a regional basis. Increasing albedo by 0.01 can offset about 1.8 to 2 kilograms of CO₂ per square metre globally, with some regions reaching up to 5 kilograms.
MIT researchers measure traffic emissions, to the block, in real-time
A new study by MIT researchers provides a high-resolution picture of auto emissions in NYC, allowing for more effective transportation and decarbonization policies. The method produces detailed data that bridges the gap between citywide emissions inventories and individual vehicle analyses.
Quebec’s residential energy use is better explained by demographics than building age, Concordia study shows
A Concordia University study found that demographic factors such as income and household size drive energy consumption in Quebec's major urban centres. The research used meter readings and census data to reveal strong links between social characteristics and energy use, with higher-income areas and larger households consuming more energy.
Elders’ stories are bringing digital models of lost communities to life
A team from Ohio State University has digitally reconstructed three historically Black communities that were fragmented or demolished for freeway construction. The project, known as Ghost Neighborhoods of Columbus, aims to show how urban renewal decisions of the past have a positive impact on future development.
AMS Science Preview: Mississippi River, ocean carbon storage, gender and floods
Researchers investigated the Mississippi River's hydrological trends, ocean carbon storage, and gender dynamics in flood mortality. A study found that precipitation increases, but soil moisture decreases, while high-resolution models reveal stronger Southern Ocean carbon absorption. Additionally, data showed men are overrepresented in ...
Less traffic, less noise: Green axes reduce noise levels in cities
A study in Barcelona found that pedestrianisation reduces noise levels by 3.1 dB, exceeding WHO guidelines, but finds no impact from pedestrian activity, which takes over acoustical space previously dominated by motorised traffic.
More trees where they matter, please
A new study reveals disparities in urban shade levels, leading to greater health risks and exacerbating the 'heat island' effect in cities. Wealthier neighborhoods tend to have more trees, resulting in better shade provision for pedestrians, highlighting a consistent link between wealth and neighborhood tree abundance.
When blackouts occur during heat waves, Austin homes pose major risk
A new study assesses indoor heat vulnerability for each single-family home in Austin, finding that 85% of homes would pose significant risk to an elderly person during a power outage. The city can now take a methodical approach to mitigating risk through cooling centers and home weatherization programs.
I’m walking here! A new model maps foot traffic in New York City
A new model maps foot traffic in New York City, providing insights into pedestrian activity and hazard locations. The study reveals high densities of foot traffic outside Manhattan, with many streets having similar foot-traffic levels to Manhattan's busiest areas.
Temperature of some cities could rise faster than expected under 2°C warming
Research from the University of East Anglia predicts that tropical cities will experience increased urban heat island effects under 2°C global warming. The study finds that up to 81% of medium-sized cities will warm more than surrounding rural areas, with some experiencing warming rates up to 100% higher.
Fresh and healthy food can be difficult for some Montrealers to access, new Concordia study shows
A new Concordia study finds that Montrealers face difficulties accessing fresh and healthy food due to inadequate public transportation and limited grocery store locations. The researchers recommend combining active transportation with public transit to increase accessibility to healthy food establishments.
How cities primed spotted lanternflies to thrive in the US
Urbanization may be shaping the spotted lanternfly's spread into new environments by allowing them to adapt to heat, pollution, and pesticides. The insects' genetic diversity is lower in the US compared to China, but they are still adapting to local climate conditions.
Most EV charging stations are out of walking distance for older Montrealers, Concordia research shows
A Concordia University study reveals that nearly half of Montreal's elderly care facilities lack public EV charging stations within a 15-minute walk. This limits access not only for residents but also for caregivers and staff. Strategically placing new chargers in underserved areas can improve accessibility without expanding the network.
Citizen science and the challenge of measuring urban sustainability
A new study by IIASA and UN-Habitat finds that citizen science can strengthen urban sustainability monitoring, particularly for issues like air quality and community wellbeing. The analysis reveals that many indicators remain incomplete and are reported mainly at national level.
Living walls boost biodiversity by providing safe spaces for urban wildlife
A new study has found that living walls can significantly enhance urban biodiversity by attracting pollinators and other wildlife. The research revealed that soil-based living walls with plants in soil attracted more wildlife than those with artificial substrates, and specific plant species like ivy and honeysuckle were most effective.
Trees — not grass and other greenery — associated with lower heart disease risk in cities
A multi-institutional study found that living in urban areas with visible trees is associated with a lower incidence of cardiovascular disease, with a 4% decrease. In contrast, higher percentages of visible grass were linked to a 6% increase in cardiovascular diseases.
Global inequality in parks undercutting ‘suburban dream,’ new research suggests
A new study from King's College London and Nokia Bell Labs found that inner-city parks consistently scored higher in cultural, natural, social, and physical activity provisions compared to suburban parks. This suggests that urban inequality may be undermining the 'suburban dream' of having access to high-quality green spaces.
Limiting urban sprawl requires establishing clear targets and limits to expansion, new Concordia study proposes
Cities need clear limits on urban sprawl to achieve sustainability. A new Concordia study proposes combining greenbelts with densification policies to limit sprawl and promote sustainable development. The study found that without additional policies, greenbelts alone are insufficient to halt urban sprawl.
Fewer layovers, better-connected airports, more firm growth
A new study by MIT researchers reveals that cities with strong airline connections are more likely to attract multinational firms, particularly in knowledge industries. The study analyzed 7.5 million firms in 800 cities and found that direct flights lead to a 20% increase in subsidiaries, compared to cities with only one-stop connections.
New framework reveals where transport emissions concentrate in Singapore
A new framework reveals that compact, mixed-use districts like One-North are designed to generate cleaner travel patterns, but the reality is more complex. Emissions hotspots were identified at major arterial roads, weaker transit-accessible edges of districts, and busy corridors like North Buona Vista Road.
Hidden patterns of isolation and segregation found in all American cities
A comprehensive analysis of 383 US cities found common patterns of isolation and segregation, with wealthy suburban areas and poorer downtown zones often having limited interactions between residents. Researchers recommend zoning incentives and strategic development to encourage greater diversity and social mixing.
Why didn’t the senior citizen cross the road? Slower crossings may help people with reduced mobility
Research finds that standard road crossing intervals are too short for older adults with limited mobility, resulting in a need for slower crossings. The study analyzed walking speeds of 1,110 adults aged 65 and over and found that just 1.5% can cross the road within the typical time allowed by pedestrian signals.
Urban blue spaces: Quietly supporting food, income and community
A research team led by Göttingen University found that urban blue spaces play a critical role in food security and social inclusion in four major Indian cities. Women, the elderly, and marginalized communities most frequently collected, shared, cooked, and sold food products.
Urban sprawl could deny 220 million people access to clean water by 2050
A study analyzing over 100 cities in Asia, Africa, and Latin America found that compact urban planning is crucial for delivering water and sanitation to growing populations. The research suggests that if cities spread outward rather than building more densely, access to clean water and basic sanitation could be significantly impacted.
Over half of global coastal settlements are retreating inland due to intensifying climate risks
Over half of global coastal settlements have retreated from the coast over the past 30 years in response to intensifying climate hazards. Coastal regions in Africa and Oceania lead the retreat, while poorer regions often expand shoreline settlements due to economic needs.
Study identifies great potential for forest restoration in urban fringe areas
Researchers from the University of São Paulo identified 410,000 hectares in the state of São Paulo, Brazil, with potential for forest restoration in urban fringe areas. These areas have diverse land uses and are not normally included in surveys of potential restoration areas.
AMS Science Preview: Railways and cyclones; pinned clouds; weather warnings in wartime
Researchers investigate how adjacent cities exacerbate each other's heat island effects. A study also highlights the need for improved hindcasting infrastructure in climate science. Additionally, a campaign monitors pinned clouds over industrial sources of heat and finds that trees are more reliable against heat stress than buildings.
AI innovation missing the mark for local communities
A new report by the University of Warwick finds that artificial intelligence is being developed primarily for efficiency and service improvements, rather than benefits for local communities. The report calls for greater public participation in AI policy design to ensure technologies deliver tangible benefits where they are needed most.
People in isolated cities in Africa suffer more violence against civilians
A new study by Complexity Science Hub researcher Rafael Prieto-Curiel challenges the assumption that larger cities are more violent. The study shows that isolated cities, with limited highway connections, experience nearly seven times more violence against civilians per 100,000 residents than well-connected cities.
Open spaces in cities may be hotspots for coyote-human interaction
A new study suggests that coyotes are more likely to overlap with humans in areas with high levels of open space, such as parks and golf courses. The analysis found that coyotes were attracted to areas with moderate levels of open space, like parks or golf courses, where they could find food and shelter. In contrast, coyotes may be les...
Humans are evolved for nature, not cities
A new paper argues that modern life has outpaced human evolution, leading to chronic stress and health issues. The researchers suggest that societies need to rethink their relationship with nature and design healthier environments to mitigate these effects.
Concordia researchers model a sustainable, solar-powered 15-minute city
Concordia researchers propose a new model for urban development combining key strategies to ensure an environmentally friendly future. By integrating energy, mobility, land use, and social functions, the 15-minute city principle can be applied to create sustainable neighborhoods with reduced carbon emissions.
Beyond rent: Shared houses in Tokyo offer lifestyle, safety, and community
Shared houses in Tokyo are marketed as lifestyle-driven homes focusing on comfort, connection, and personal growth. The study reveals that properties near train stations emphasize accessibility and neighborhood convenience, while those farther away highlight natural surroundings and social interaction.
Cities around the world must plan more explicitly to reach UN goals on inclusivity, safety, resilience, and sustainability, new research reveals
A new report from the University of Liverpool highlights the uneven progress toward achieving UN SDG11, a goal to make cities more inclusive, safe, and sustainable. To meet this goal by 2030, planners must translate global awareness into local action.
Metros cut car use in European cities, but trams fall short
A new study from the Complexity Science Hub found that European cities with a metro system have a significant reduction in car use, with an average of 37% of car trips compared to 50% in cities with only trams and 54% without rail. In contrast, tram cities show no measurable impact on reducing car use.
Painting memory: Lithuanian researchers explore how street art shapes urban identity
Street art in Kaunas, Lithuania acts as a form of cultural activism and collective memory, blending languages, images, and historical narratives. Murals have become powerful tools for community reflection and dialogue, turning public space into a living archive of cultural identity.
Who benefits from neighborhood parks?
A new study found that public greenspaces are lacking in many American communities, with some groups facing significant barriers to access. The research highlights the need for more inclusive park planning and distribution to ensure equal benefits for all residents.
Arctic town Kiruna is colder after the move
The city's relocation to a depression resulted in colder temperatures, up to 10 degrees lower in winter. The new design prioritizes aesthetics over climate protection, creating a 'bloody wind tunnel' and neglecting essential features like snow insulation.
‘Slums’ of Victorian Manchester housed wealthy doctors and engineers, new study reveals
A new study reveals that middle-class Mancunians, including doctors and engineers, lived alongside working-class residents in the same buildings and streets. The research found that over 60% of buildings housing wealthy occupational classes also housed unskilled laborers.
How to make ‘smart city’ technologies behave ethically
Researchers propose using the Agent Deed Consequence (ADC) model to program ethical values into smart city technologies. The model captures human moral judgments by considering agent intent, deed, and consequence, enabling AI systems to distinguish between legitimate and illegitimate orders.
Concordia study links urban heat in Montreal to unequal greenspace access
A Concordia University study reveals that neighborhoods with lower incomes and higher proportions of racialized residents tend to be hotter due to less vegetation. Increasing tree coverage can lower land surface temperature by 1.4°C, but wealthier areas have more access to green infrastructure.
Food delivery apps depend on cheap immigrant labor to survive, Concordia research shows
A study of food delivery couriers in Montreal and Toronto reveals a system characterized by low pay, long hours, and limited job security. The research highlights the role of economically precarious immigrant workers in supporting the industry's rapid growth.
Why some U.S. cities thrive while others decline: New study uncovers law of economic coherence of cities
A new study reveals that US cities maintain a constant level of economic coherence despite technological revolutions, with larger cities being less coherent. Coherence combines variety, workforce balance, and industry diversity, constraining transformations and diversification.
Political agreement paves the way for a new Danish epicenter for innovation with international ambitions
A new vision plan for Innovation District Copenhagen outlines a comprehensive strategy to strengthen cooperation between businesses, educational institutions, and public actors. The district is set to become Denmark's new beacon for Life Science, with the goal of creating thousands of new jobs and attracting investments of billions.
Mapping an entire subcontinent for sustainable development
Researchers at the University of Chicago created an unprecedented approach to urban development using high-resolution data. The analysis shows that cities with better infrastructure have better developmental outcomes, and that improving access can improve residents' well-being beyond just physical needs.
Cities face double trouble: Extreme heat and air pollution cause increasing compound weather events
Compound heat and air pollution episodes are becoming more frequent and intense in US cities, posing a significant threat to public health. The study found that urban areas experience more frequent overlaps of extreme heat with harmful air pollutants than surrounding rural areas.
There is a hidden simplicity behind how people move
The study reveals that when physical constraints are removed, human mobility follows a power-law pattern, decreasing steadily with distance. The researchers found this pattern across five orders of magnitude, from 10 meters to hundreds of kilometers.
Pollinators in the city: Europe-wide synthesis evidences the relevance of biodiversity-friendly urban management
A European-wide synthesis finds that pollinator-promoting interventions generally benefit plants and pollinators, with varying effects depending on intervention type and habitat. The study suggests that biodiversity-friendly urban management practices can improve public perception and promote healthier ecosystems.
Eco-driving measures could significantly reduce vehicle emissions
A large-scale modeling study led by MIT researchers reveals that dynamically adjusting vehicle speeds can cut annual city-wide intersection carbon emissions by 11-22%. Implementing eco-driving measures could also result in a 25-50% reduction in CO2 emissions if only 10% of vehicles adopt the technology.
Pedestrians now walk faster and linger less, researchers find
A new study reveals that pedestrians are now walking faster and spending less time in public spaces. Researchers analyzed 40 years of video footage to find a 14% decline in people lingering in these areas.
One in four Spaniards allocates most of their income to housing
A report by ICTA-UAB reveals that 40% of Spanish tenants spend more than 30% of their income on housing, with up to 28% experiencing energy poverty. The study highlights the need for coordinated reforms to address housing inequality and improve energy efficiency.
Murals boost Cincinnati’s vitality, community development
A UC study finds that murals are associated with higher foot traffic, denser housing, and increased cultural identity in Cincinnati's neighborhoods. The research also highlights the potential for murals to contribute to urban policy decisions, guiding investments in public art to achieve broader community development goals.