Thursday, October 16, 2014

Was the Club of Rome Correct in Warning of a Global Collapse of Resources and Population?

Is Global Collapse Imminent? An Updated Comparison of The Limits to Growth with Historical Data (22 page pdf, Graham M. Turner, Melbourne Sustainable Society Insti¬tute, Aug. 2014)

Also discussed here: Limits to Growth was right. New research shows we're nearing collapse (Graham Turner and Cathy Alexander , theguardian, Sep.2, 2014)

Today we review a study from Australia that compares the business as usual scenario to 2100 presented by the Club of Rome in its Limits to Growth book to the observed trends in population, resource depletion and pollution for the last 40 years. Results indicate a very close match and leads to a fear that the collapse that was indicated in the BAU scenario around 2030 may still take place, given the reluctance of many of the world’s largest resource consumers and polluters (China, USA, Russia, Brazil, Canada, etc) to replace carbon fuel with alternative fuels. Added to that is the very real concern that the transition to renewable energy, along with decreased population rates recommended by the Club of Rome may not be possible before the impending collapse.

 club rome BAU scenarioclob of rome env BAU

Key Quotes: 

“As Limits to Growth concluded in 1972: If the present growth trends in world population, industrialisation, pollution, food production, and resource depletion continue unchanged, the limits to growth on this planet will be reached sometime within the next one hundred years. The most probable result will be a rather sudden and uncontrollable decline in both population and industrial capacity.”

“The dotted line shows the Limits to Growth “business-as-usual” scenario out to 2100. Up to 2010, the data is strikingly similar to the book’s forecasts…Resources are being used up at a rapid rate, pollution is rising, industrial output and food per capita is rising. The population is rising quickly.”

“As pollution mounts and industrial input into agriculture falls, food production per capita falls. Health and education services are cut back, and that combines to bring about a rise in the death rate from about 2020. Global population begins to fall from about 2030, by about half a billion people per decade. Living conditions fall to levels similar to the early 1900s.”

“Global pollution measured by CO2 concentration is most consistent with the BAU scenario…but this ten year data update indicates that it is rising at a somewhat slower rate than that mod¬elled.”

“Peak oil could be the catalyst for global collapse. Some see new fossil fuel sources like shale oil, tar sands and coal seam gas as saviours, but the issue is how fast these resources can be extracted, for how long, and at what cost.”

“Regardless of what role oil constraints and price increases played in the current GFC[Global Financial Crisis in 2008], a final con¬sideration is whether there is scope of a successful transition to alternative transport fuel(s) and renewable energy more generally. …To transition requires introducing a new transport fuel to compensate for possible oil production depletion rates of four per cent (or higher) while also satisfying any additional demand associated with economic growth. It is unclear that these various conditions required for a transition are possible.”

Tuesday, October 14, 2014

How Does Air Pollution Affect the Health of the Elderly?

Time after Time: Environmental Influences on the Aging Brain (Elizabeth Grossman, Environmental Health Perspectives, Sep. 2, 2014)

Today we review a paper that analyses the impacts of exposure to outdoor air pollution as it relates to the health of the elderly portion of the population - those over 80 are projected to quadruple since 2000. While exercise and intellectual stimuli can keep the brain healthy and may reduce the onset of Alzheimers, exposure to lead or organic pollutants may decrease the defensive mechanisms and increase vascular problems.

 oldage pollution

Key Quotes: 

“the population of Americans aged 65 and older is expected to double between 2010 and 2050, and by midcentury the proportion of the human population made up of people over age 80 is projected to have quadrupled since 2000”

“the brain is capable of generating new neurons and other functional brain cells even during advanced age. There is also evidence that the older brain can respond quickly and positively to external influences such as physical exercise and intellectual stimulation …converging evidence suggests exercise benefits brain function and cognition across the mammalian lifespan, which may translate into reduced risk for Alzheimer’s disease in humans.”

"The two most vulnerable periods for the brain…are early in life, when the organ is first developing, and later in life, when the body’s defenses and compensatory mechanisms begin to falter”

“declining defense mechanisms may magnify vulnerability to contemporary environmental exposures”“lead that has accumulated in bones can be mobilized over time as part of the aging process, resulting in exposures that adversely affect adults’ cognitive skills later in life”

“exposure to persistent organic pollutants including dioxins and certain polychlorinated biphenyls, halogenated flame retardants, and pesticides can produce hormonally mediated effects that promote obesity and diabetes, which increase risk for vascular health problems”

“Chemical exposures can produce health effects that set the stage for neurological disease and disorders, while physical and intellectual exercise foster brain flexibility and a healthy cognitive reserve”

Thursday, October 9, 2014

Are LRTs and Subways becoming Obsolete?

English: A Tesla Roadster, Reva i and Ford Th!...
English: A Tesla Roadster, Reva i and Ford Th!nk electric cars parked at a free parking and charging station near Akershus fortress in Oslo, Norway (Photo credit: Wikipedia)
By 2040, We Won't Need Subways (Candice Malcolm, Huffington Post Blog from Toronto Sun, Aug. 25, 2014)

Today we review a forward looking article which predicts that subways and Light Train Transit systems will be a fossil of the past when the technological revolution taking place in today and tomorrow’s cities replace them with driverless electric cars which are already a reality in some places. This outlook is not new to anyone who follows developments in urban mobility and makes one wonder about the wisdom of the Mayors in some cities, such as Toronto and Ottawa, where billions of dollars are projected and planned to buy obsolete forms of transportation that will not likely come close to meeting future demands. 


Key Quotes:

“Premier Kathleen Wynne's solution to the transportation infrastructure problem is to spend a whopping $50 billion of taxpayer money over the next 25 years to build an expansive rail network. By 2040, Toronto may finally have the subways that other cities built nearly 200 years earlier”

“examples of ideas and companies that will change transportation as we know it:
  • Ride-sharing…Lyft, the next generation ride-sharing app, has its own drivers and offers rides for a fraction of the price of taxis.
  • Autonomous, or self-driving cars…These cars, now legal in four U.S. states, have logged over a million kilometres on California roads without causing an accident
  • Electric cars…electric cars are greener and cleaner than building new subways, but will require plenty of infrastructure, like charging stations, and more roads and highways”
“These dramatic changes will revolutionize transportation in the coming years, and make a $50 billion subway system irrelevant.”

Tuesday, October 7, 2014

What are the Costs of Chauffering?

Evaluating Household Chauffeuring Burdens - Understanding Direct and Indirect Costs of Transporting Non-Drivers (11 page pdf, Todd Litman, Victoria Transport Policy Institute, Aug. 24, 2014)

Today we review a research paper on the extent to which household chauffeuring of non-drivers, such as children or the elderly, is affected by the lack of public transit or the amount of urban sprawl. Analysis shows that up to 15% of total vehicle travel is spent chauffeuring and this sometimes contributes to traffic congestion because of return trips in an empty vehicle, as is the case when parents drive their children to school. This in turn has an economic cost (estimated at $332 M in the USA) which includes the operating costs, the driver’s time and the amount of congestion that slows other drivers commuting to work. As the number of elderly non-drivers doubles over the next decade, this aspect of vehicle travel will become even more important and calls for a higher priority for public transit as well as more attention to incentives for cycling and walking. chauffering  

Key Quotes:

 “Chauffeuring (also called escort transport) refers to motor vehicle travel specifically made to transport independent non-driver…. in 5-15% of total vehicle travel is for chauffeuring independent non-drivers, with higher rates for families with independent non-drivers (adolescents, people with disabilities, and fail seniors) located in automobile-dependent communities. “

“The portion of Americans 14-64 years of age without a driver's license rose from 21% in 2000 to 26% in 2012 …and even drivers who possess a license sometimes need chauffeuring if they cannot afford a vehicle, their vehicle fails, or they are impaired.”

“Poor public transit options often forced one parent, usually the mother, to reduce her work hours and spend more time transporting children…married women with children make 2.3 trips with their children each day, nearly half of their 5.0 total average trips,”

“In 2009, school travel generated 5%–7% of vehicle travel and 10%–14% of all morning peak private vehicle travel …40% of parents who drive children to school return directly home which is probably relatively high percent for chauffeured trips since school commutes are relatively easy to coordinate with work commutes and errands”

"A survey of 1,237 British parents found that on average they drive 1,664 miles annually chauffeuring children …which is 23% of the 7,115 average annual miles driven per private car”

 “chauffeur vehicle trip lengths average 5 miles in compact communities and 10 miles in sprawled communities”

“Estimating that chauffeuring costs (including vehicle operating costs and drivers’ time valued at $12 per hour, which assumes a mix of low- and high-stress driving conditions) average $5.25 per trip or $1.05 per vehicle-mile, they estimate that rural and small urban transit services save $332 million annually in chauffeuring costs, 8% of the $4,276 million total estimated economic benefits.”

 “automobile dependency and sprawl require drivers to spend an additional 52 hours and 82 gallons of fuel to drive 1,648 annual vehicle miles compared with the same households located in a compact, multi-modal community. “

“improving walking and cycling conditions, public transit and taxi services, and land use accessibility by increasing development density and mix tends to reduce automobile dependency and allow non-drivers more independent mobility”

Thursday, October 2, 2014

How does Urbanization Affect Carbon Emissions and Climate Change Mitigation?

Although an important factor, there is a compl...
Although an important factor, there is a complex relationship between urban densities and car use. (Photo credit: Wikipedia)
Urbanization and the carbon cycle: Contributions from social science (49 page pdf, Peter J. Marcotullio, Sara Hughes, Andrea Sarzynski3, Stephanie Pincetl, Landy Sanchez Peña5, Patricia Romero-Lankao, Daniel Runfola andKaren C. Seto, Earth's Future, Aug. 20, 2014) 

Today we review research into the links between various forms of urbanization and carbon emissions, a particularly important issue given the need to reduce these emissions in a world that is rapidly becoming more urban. The paper examines the social relationships and such questions as the size of cities, the impact of higher incomes, aging, household size and the potential impact of urban planning- the aging process alone may reduce emissions by up to 20% and the trend toward an older society will be an important factor to consider along with the future shape of cities.



Key Quotes: 

“changes in a societies’ economic structure, advances in technologies and differential levels of productivity amongst sectors that accompany economic growth… help to push people away from rural areas and pull people to live in cities”“firms and individuals also respond to congestion, noise, stress, crime, disease, and pollution, which can increase costs and reduce the attractiveness of cities” 

 “urban areas with larger population sizes have proportionally smaller energy infrastructures than smaller cities… Other evidence suggests that GHG emissions may increase more than proportionally to population size, such that larger cities exhibit proportionally higher energy demand as they grow than do smaller cities” 

“Economic activity levels vary over a person’s lifetime, and mobility patterns and energy consumption adjust to changing household needs, time use and expectations” 

 “the aging process alone can reduce emissions in the long term (100 year timeline) by up to 20%, particularly in industrialized regions…. projection estimates that 25% of populations will be over the age of 60 by 2050, compared to 10% in 2000. ” 

“Household size is also an important quality of urban populations that affects the relationship between urbanization and the carbon cycle.. urban populations typically have smaller household sizes than rural populations, andhousehold size is decreasing globally” 

 “In the developed world, the inability of local power brokers in New York City for example, to develop highways in the urban core ..had lasting impact on transit use and subsequent motor vehicle use” 

“zoning regulations and land use plans help to determine urban form, leading to a variety of interconnected outcomes, which can shape energy use and net GHG emissions.” 

 “local climate change actions have the potential to reshape cities in ways that further marginalize disadvantaged urban populations, a dynamic that has been understudied by social scientists” 

 “In almost all cases, scholars have worked within disciplinary boundaries at the expense of developing a holistic, process-based definition of urbanization”

Tuesday, September 30, 2014

Why Does Canada’s Largest City Not Meet National Air Quality Standards?

The impacts of precursor reduction and meteorology on ground-level ozone in the Greater Toronto Area (11 page pdf, S. C. Pugliese, J. G. Murphy, J. A. Geddes, J. M. Wang, Atmospheric Chemistry and Physics, Aug. 22, 2014)

Also discussed here: Despite significant reduction in smog-producing toxins, the Greater Toronto Area still violates Canada's standards for ozone air pollution (Kim Luke, Science Daily, Aug. 22, 2014)

Today we review recent measurements of pollutants included in the Canada Wide Air Quality Standards as they apply to the City of Toronto which has the largest population (of people as well as pollution emitting vehicles) and urban area of all cities in Canada. Resultrs indicate that despite a reduction in emissions of NO2 and PM2.5 of 27 to 50% over the last 4 years, Ozone (O3) exceeded the standards in 2012 at all eight monitoring stations. The authors speculate that this was due to the meteorology of that year which showed a large number of sunny days and light winds which contributed to the production of O3 (from NO2 emissions 63% of which come from from vehicles and O2). They also recommend that volatile organic compounds (VOCs) 
  be included in the standards.


 ozone days-toronto 

Key Quotes:

“While the Greater Toronto Area has significantly reduced some of the toxins that contribute to smog, the city continues to violate the Canada-wide standards for ozone air pollution”

“since 2000, all sites experienced a decrease in NO2 of 28–62% and in measured VOC reactivity of at least 53–71 %....The city’s NOx emissions are dominated by the transportation sector (63 %), with diesel trucks accounting for a disproportionately large percentage (36 %)”

“These reductions are in line with the city's 2007 commitment to reducing smog precursors, and can be attributed to the implementation of pollution control measures like the Drive Clean program, and the closure of coal-fired power plants in the region”

“it was found that the Canada-wide Standard for ozone continues to be exceeded at all monitoring stations.”

“In Toronto, ground-level ozone is responsible for 13–29% of the incidences of premature mortality and hospitalizations associated with air pollution (with PM2.5 and NO2 being responsible for the remainder)”

"We are able to show that high ozone in 2012 was due to the relatively high number of sunny days that allowed ozone to be produced quickly, and low winds, that allowed the pollution to accumulate locally,"

“The importance of including OVOCs in O3 production analyses has been demonstrated, as short-term measurements indicate that they account for a significant fraction of OH reactivity”

Thursday, September 25, 2014

What are the Health Impacts for People Living Near Biodegradable Waste Sites?

Respiratory and sensory irritation symptoms among residents exposed to low-to-moderate air pollution from biodegradable wastes (Abstract, Victoria Blanes-Vidal, Jesper Bælum, Joel Schwartz, Per Løfstrøm and Lars P Christensen, Journal of Exposure Science and Environmental Epidemiology, Aug. 21, 2014)

Also discussed here: Respiratory, Sensory and General Health Symptoms among Populations Exposed to Air Pollution from Biodegradable Wastes (1 page pdf, Victoria Blanes-Vidal, Jesper Bælum, Joel Schwartz, Esmaeil S. Nadimi, Per Løfstrøm, Lars P. Christensen, Poster Paper, International Society for Environmental Epidemiology, Aug. 21, 2014)

Today we review research from Denmark which examined the direct and indirect impacts for people in residences near biodegradable waste sites. Results indicate increased frequency of respiratory and sensory irritation symptoms directly related to dose and exposure.

  bio waste  

Key Quotes:

 “A large number of potentially hazardous pollutants are emitted during handling, storage, treatment and disposal of agricultural, animal and municipal biodegradable wastes”

“Environmental exposures play an important role in the genesis of respiratory, sensory and general health symptoms among residents exposed to low-to-moderate air pollution from biodegradable wastes”

 “In some cases, the health effects of air pollution seem to be indirect, relayed through stress-related mechanisms. However, we found evidence of direct effects for some of the symptoms as well”

“Residential NH3 exposure was associated with increased frequency of four symptoms, including “eyes itching, dryness or irritation” and “cough”.. Odor annoyance mediated the effect of exposure on cough and three sensory irritation symptoms.”

“Significant associations were also found between individual NH3 exposures and ‘‘chest wheezing or whistling’’ and ‘‘runny nose’’”

“This study provides support for the existence of indirect associations between residential exposures to low-to-moderate air pollution from wastes and symptoms, as well as direct dose-response associations for some of the symptoms.”