Current Megacities News and Events

Current Megacities News and Events, Megacities News Articles.
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The invisible smallest particles matter for the air we breathe
Researchers of the University of Helsinki have resolved for the first time, how the ultrafine particles of atmosphere effect on the climate and health. (2021-02-23)

Local emissions amplify regional haze and particle growth
A Finnish-Chinese research team performed simultaneous measurements of aerosol composition and particle number size distributions at ground level and at 260 m in central Beijing, China, during a total of 4 months in 2015-2017. The team found concentration of both primary and secondary particles in the accumulation mode would decrease drastically, and the haze formation would be reduced if the emission cuts are higher than 30%. (2021-01-29)

Pollution from cooking remains in atmosphere for longer - study
Particulate emissions from cooking stay in the atmosphere for longer than previously thought, making a prolonged contribution to poor air quality and human health, according to a new study. (2020-12-08)

A sweeping climate model of the Red Sea
An all-inclusive climate model for the entire Red Sea region is supporting Saudi Arabia's plans for a sustainable future. (2020-11-16)

Coastal cities leave up to 75% of seafloor exposed to harmful light pollution
New research is the first in the world to quantify the extent to which biologically important artificial light is prevalent on the seafloor and could, in turn, be having a detrimental effect on marine species. (2020-07-30)

COVID-19 lockdown reduced dangerous air pollutants in five Indian cities by up to 54 percent
The COVID-19 crisis and subsequent lockdown measures have led to a dramatic reduction of harmful air pollutants across major cities in India, finds a new study from the University of Surrey. (2020-07-16)

A chemical cocktail of air pollution in Beijing, China during COVID-19 outbreak
Air pollution during the COVID-19 lockdown in Beijing was mainly due to different chemical responses of primary and secondary aerosols to changes in anthropogenic emissions. (2020-07-07)

New study shows dominance of local air pollution sources in Delhi
The University of Surrey has revealed results from a new, comprehensive study that suggests that activities such as construction and vehicle traffic contribute significantly to the Delhi National Capital Region's high concentrations of harmful air pollutants and gases. (2020-01-09)

Untangling links between nitrogen oxides and airborne sulfates helps tackle hazy air pollution
A research team led by scientists from the Hong Kong University of Science and Technology (HKUST) unveiled a first-in-kind study of nitrogen oxides (NOx) and its role in the rise and fall of airborne sulfates in hazy air pollution, offering policymakers new insights into ways to tackle smoggy weather. (2019-12-23)

Scientists use a new method to track pollution from cooking
Scientists find that black carbon is a good tracer to separate cooking organic aerosol from traffic-related organic aerosol. (2019-08-23)

Tapping fresh water under the ocean has consequences
While offshore groundwater resources could be used for drinking, agriculture and oil recovery, new research suggests tapping into them could lead to adverse impacts onshore. (2019-05-02)

Unravelling the complexity of air pollution in the world's coldest capital city
A joint Mongol-Japanese research team from the National University of Mongolia and Kanazawa University conducted the first detailed study of organic air pollutants in Ulaanbaartar city. The polycyclic aromatic hydrocarbon (PAH) contents of airborne particulates were determined, and indicated that the degree of air pollution varies markedly by district and season. (2019-04-25)

Crop residue burning is a major contributor to air pollution in South Asia
Urban emissions of black carbon from fossil fuel combustion are not always the main contributor to severe air pollution in south Asian megacities like New Delhi, shows a new study by researchers from Stockholm University and the Indian Institute for Tropical Meteorology, published in the journal Nature Sustainability. (2019-02-27)

The puzzling problems of urban particle formation
Researchers who studied the heavily polluted air of Shanghai, China, between 2014 and 2016 report the chemical conditions that led to the surprising formation of new particles in the city's atmosphere, particles that likely worsened regional air quality. (2018-07-19)

A bright and vibrant future for seismology
Fiber-optic cables can be used to detect earthquakes and other ground movements. The data cables can also pick up seismic signals from hammer shots, passing cars or wave movements in the ocean. This is the result of a study appearing in the journal Nature Communications on July 3, 2018. Main authors are Philippe Jousset and Thomas Reinsch from GFZ German Research Centre for Geosciences. They carried out the investigation together with colleagues from Island, UK, Berlin, Germany, and Potsdam, Germany. (2018-07-03)

NUS-led study: Beltway to divert diesel trucks in Sao Paulo improved public health
A study by researchers from the National University of Singapore and the University of Sao Paulo revealed that a beltway constructed to divert heavy-duty diesel vehicles traffic in the Brazilian city of Sao Paulo has reduced public health damage associated with exposure to diesel. The positive health outcomes of the intervention could guide the formulation of similar transport polices in other cities, where humans and diesel vehicles reside and transit in close proximity. (2018-04-27)

Evidence mounts for Alzheimer's, suicide risks among youth in polluted cities
A University of Montana researcher and her collaborators have published a new study that reveals increased risks for Alzheimer's and suicide among children and young adults living in polluted megacities. (2018-04-13)

World's largest cities depend on evaporated water from surrounding lands
A study found that 19 of the 29 largest cities in the world depend on evaporation from surrounding lands for more than one-third of their water supplies. (2018-03-13)

World's biggest city database shines light on our increasingly urbanized planet
The world's largest data platform on cities, launched by the Joint Research Centre, the European Commission's science and knowledge service, reveals the planet is even more urbanized than we thought. (2018-02-13)

Rise in severity of hottest days outpaces global average temperature increase
While our planet's average annual temperature has increased at a steady pace in recent decades, there has been an alarming jump in the severity of the hottest days of the year during that same period, with the most lethal effects in the world's largest cities. (2018-01-24)

20 percent more trees in megacities would mean cleaner air and water, lower carbon and energy use
Planting 20 percent more trees in our megacities would double the benefits of urban forests, like pollution reduction, carbon sequestration and energy reduction, according to a study in Ecological Modelling. The authors of the study say city planners, residents and other stakeholders should start looking within cities for natural resources and conserve the nature in our urban areas by planting more trees. (2018-01-18)

Frequent growth events and fast growth rates of fine aerosol particles in Beijing
Secondary aerosol formation and rapid increases in aerosol particle sizes are believed to play important roles in haze formation. However, some simple but important questions remain unanswered, such as: How frequently and how fast do fine aerosol particles grow? And what affects their rates of growth? (2018-01-11)

Women in India nearly 40 times more likely to die after assault as their US peers
Women in India are nearly 40 times more likely to die after being assaulted than are their female peers in the US, finds a comparative analysis of trauma data from both countries, published in the online journal BMJ Global Health. (2017-08-31)

What's the annual value of trees? $500 million per megacity, study Says
In the megacities that are home to nearly 10 percent of the world's 7.5 billion people, trees provide each city with more than $500 million each year in services that make urban environments cleaner, more affordable and more pleasant places to live. (2017-08-22)

Sydney Harbor emissions equivalent to 200 cars on the roads
The first footprint of Sydney Harbor's carbon emissions has found it is roughly equivalent to similar natural 'drowned river' estuaries in the US but significantly less than polluted water sources straddling build-up areas in Europe and Asia. The footprinting of the growing megacity icon has implications for planning and remediation efforts in highly urbanized areas in an environment of climate change. (2017-06-02)

Seven months after Rio Olympics, Zika continues to plague babies in urban slums
The near-paranoia related to Zika leading up to the 2016 Rio Games could have been avoided by heeding the lessons of previous epidemics, argues a new study from public health researchers at UC Berkeley. (2017-03-23)

NTU Singapore and Schaeffler set up joint lab to develop smart mobility devices
In the future, you could get off the train and hop onto an electric kickboard equipped with a smart unit that can warn you of potential hazards while it navigates you home. (2017-03-20)

New study reveals air pollution can alter effectiveness of antibiotics
Interdisciplinary research at the University of Leicester has explored the impact of black carbon on bacteria in the respiratory tract. (2017-03-02)

Using Google to map our ecosystem
Researchers in the Singapore-ETH Centre's Future Cities Laboratory developed a method to quantify ecosystem services of street trees. Using nearly 100,000 images from Google Street View, the study helps further understanding on how green spaces contribute to urban sustainability. (2017-02-28)

Utah State University researchers receive American Water Resources Association Award
Utah State University researchers Enjie Li, Joanna Endter-Wada and Shujuan Li were honored with the 2016 William R. Boggess Award at the American Water Resources Association Annual Conference held Nov. 13-17, in Orlando, Fla. (2016-12-09)

Two tales of a city to understand sustainability
Just as there are two sides to every story, sustainability challenges have at least two stories to reach every solution. More than half of the people in the world live in cities. Understanding how cities can have enough water to sustain people, industries and the environment will mean integrating the stories of local struggles and successes with the sweeping narrative of how lands near and far are affected by water demands. (2016-10-12)

Los Angeles mountain lions hunt closer to human settlements than expected
Mountain lions hunt their mule deer prey closer to human settlements around Los Angeles than locations randomly distributed across their home ranges, according to a study published July 13, 2016. in the open-access journal PLOS ONE by John Benson from the University of California, Los Angeles, US, and colleagues. (2016-07-27)

Sea level rise threatens larger number of people than earlier estimated
More people live close to sea coast than earlier estimated, assess researchers in a new study. These people are the most vulnerable to the rise of the sea level, increased number of floods and intensified storms. By using recent increased resolution datasets, Aalto University researchers estimate that 1.9 billion inhabitants, 28 percent of the world's total population, live closer than 100 km from the coast in areas less than 100 meters above the present sea level. (2016-03-08)

A long, hot view: Climate change likely to extend across next 10,000 years
Warming temperatures, melting glaciers and rising sea levels persist for 10,000 years in a new set of research-based climate change scenarios developed by an international team of researchers. (2016-02-08)

UK and Chinese scientists join forces to combat city pollution
New research into toxic fumes polluting a Chinese megacity could help protect the health of millions in the coming decades. (2015-12-07)

It takes a village -- and much more -- to quench megacity water demands
scientists at Michigan State University propose a novel way to begin understanding what happens to the globe when large cities -- think Beijing, Los Angeles, Sao Paulo -- reach far to get the water they need. (2015-12-03)

The economic significance of cities increases while that of countries falls
Lucía Sáez, co-author of the article Benchmarking urban competitiveness in Europe to attract investment, stresses that globalization has been accompanied by a parallel locating process, plus an increase in the economic and political power of cities and of the regions to which they belong. This researcher stresses that cities with greater economic success are those that act with a certain independence from their national economies and compete internationally, so in crisis situations they suffer less than the latter. (2015-11-20)

New study uncovers the underlying causes of Delhi's air pollution problems
A new study 'Air Pollution Challenges for developing megacities like Delhi' published today in Atmospheric Environment has described how Delhi suffers a toxic blend of geography, growth, poor energy sources and unfavorable weather that perpetuates and propagates its dangerously high levels of air pollution. (2015-10-29)

Megacity metabolism: Is your city consuming a balanced diet?
New York is an energy hog, London and Paris use relatively less resources and Tokyo conserves water like a pro. These are just a few of the findings from a new study on 'megacity metabolism' -- the world's first comprehensive survey of resources used and removed in each of the world's 27 largest metropolitan areas. (2015-04-28)

NTU Singapore and TUM design world's first electric taxi for the tropics
The world's first electric taxi for tropical megacities has been launched. Named EVA, the electric taxi is built by TUM CREATE, a collaboration between Nanyang Technological University Singapore and Germany's Technische Universität München. (2015-04-24)

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