Jamble Magazine Green Economy – Green News


August 10, 2018

Five foods linked to ADHD

Category: Green Economy,Green News – Admin 12:34 pm

Artificial food coloring has long been suspected of contributing to diagnoses of Attention-Deficit Hyperactivity Disorder (ADHD), but a new study from Perth’s Telethon Institute for Child Health Research shows an association between and the broader diet patterns of a ‘Western-style’ diet in adolescents. The research has just been published online in the international Journal of Attention Disorders.

Leader of nutrition studies at the institute, Associate Professor Wendy Oddy, explained that the researchers looked at the dietary patterns of 1,800 adolescents from the Raine Study and classified diets into ‘Healthy’ or ‘Western’ patterns. The Raine Study is an ongoing health research project which has followed a large group of mothers and their offspring over the past 18 years.

What researchers found is that a diet high in foods typical of the standard Western diet was associated withmore than double the risk of having an ADHD diagnosis, compared with a diet low in the Western pattern — even after adjusting for other social and family influences.

The professor explains: “We looked at the dietary patterns amongst the adolescents and compared the diet information against whether or not the adolescent had received a diagnosis of ADHD by the age of 14 years. In our study, 115 adolescents had been diagnosed with ADHD, 91 boys and 24 girls.”

A ‘healthy pattern’ is a diet high in fresh fruit and vegetables, whole grains, and fish — it is generally higher in omega-3 fatty acids, folate, and fibre. A ‘Western pattern’ is a diet generally higher in total fat, saturated fat, refined sugar, and sodium.

August 9, 2018

The winds of climate-change

Category: Green News – Tags: , , – Admin 8:39 pm

A new MIT analysis may serve to temper enthusiasm about wind power, at least at very large scales. Ron Prinn, TEPCO Professor of Atmospheric Science, and principal research scientist Chien Wang of the Department of Earth, Atmospheric and Planetary Sciences, used a climate model to analyze the effects of millions of wind turbines that would need to be installed across vast stretches of land and ocean to generate wind power on a global scale. Such a massive deployment could indeed impact the climate, they found, though not necessarily with the desired outcome.  In a paper published online Feb. 22 in Atmospheric Chemistry and Physics, Wang and Prinn suggest that using wind turbines to meet 10 percent of global energy demand in 2100 could cause temperatures to rise by one degree Celsius in the regions on land where the wind farms are installed, including a smaller increase in areas beyond those regions. Their analysis indicates the opposite result for wind turbines installed in water: a drop in temperatures by one degree Celsius over those regions. The researchers also suggest that the intermittency of wind power could require significant and costly backup options, such as natural gas-fired power plants.  Previous studies have predicted that annual world energy demand will increase from 14 terawatts (trillion watts) in 2002 to 44 terawatts by 2100. In their analysis, Prinn and Wang focus on the impact of using wind turbines to generate five terawatts of electric power.

Using a climate model developed by the U.S. National Center for Atmospheric Research, the researchers simulated the aerodynamic effects of large-scale wind farms — located both on land and on the ocean — to analyze how the atmosphere, ocean and land would respond over a 60-year span.  For the land analysis, they simulated the effects of wind farms by using data about how objects similar to turbines, such as undulating hills and clumps of trees, affect surface “roughness,” or friction that can disturb wind flow. After adding this data to the model, the researchers observed that the surface air temperature over the wind farm regions increased by about one degree Celsius, which averages out to an increase of .15 degrees Celsius over the entire global surface.

According to Prinn and Wang, this temperature increase occurs because the wind turbines affect two processes that play critical roles in determining surface temperature and atmospheric circulation: vertical turbulent motion and horizontal heat transport. Turbulent motion refers to the process by which heat and moisture are transferred from the land or ocean surface to the lower atmosphere. Horizontal heat transport is the process by which steady large-scale winds transport excessive heat away from warm regions, generally in a horizontal direction, and redistribute it to cooler regions. This process is critical for large-scale heat redistribution, whereas the effects of turbulent motion are generally more localized.

In the analysis, the wind turbines on land reduced wind speed, particularly on the downwind side of the wind farms, which reduced the strength of the turbulent motion and horizontal heat transport processes that move heat away from the Earth’s surface. This resulted in less heat being transported to the upper parts of the atmosphere, as well as to other regions farther away from the wind farms. The effect is similar to being at the beach on a windy summer day: If the wind weakened or disappeared, it would get warmer.

In contrast, when examining ocean-based wind farms, Prinn and Wang found that wind turbines cooled the surface by more than one degree Celsius. They said that these results are unreliable, however, because in their analysis, they modeled the effects of wind turbines by introducing surface friction in the form of large artificial waves. But they acknowledge that this is not an accurate comparison, meaning that a better way of simulating marine-based wind turbines must be developed before reliable conclusions can be made.

Courtesy of MIT news

The publication concludes that using wind turbines to meet 10% or more of global energy demand in 2100, would;

  • Require about 13 million wind turbines
  • Occupy a continental-size area
  • Cause surface warming exceeding 1 C over land installations
  • Cause alterations of the global distributions of rainfall and clouds
  • Cause climatic perturbation well beyond the installation regions
  • Reduce convective precipitation in the Northern Hemisphere
  • Enhance convective precipitation in the Southern Hemisphere
  • Cause higher energy costs and undesired environmental impacts
  • The intermittent nature of wind power on daily, monthly and longer time scales would require backup generation, onsite energy storage, and costly, very long-distance power transmission lines, all of which require technological advances to accomplish.

download study:

Prinn cautioned against interpreting the study as an argument against wind power, urging that it be used to guide future research that explores the downsides of large-scale wind power before significant resources are invested to build vast wind farms. “We’re not pessimistic about wind,” he said. “We haven’t absolutely proven this effect, and we’d rather see that people do further research.”

July 9, 2018

Arise stock already benefiting from Ontario FIT

Category: Green News – Admin 8:39 pm

I was sent this information by GreenChipStocks, a green investment/advising website, and although I’m not really surprised with the information, I am unsettled that the future profits of a company that,

doesn’t have a groundbreaking solar product, nor is their price drastically different from any of their competitors.

are being made on a marked up publicly subsidized feed-in rate.  When Halliburton’s stock goes through the roof with the incurring of lucrative government contracts for infrastructure rebuilding projects people jump up and take notice.  When it happens in the renewable energy world no one really seems to care.

That chart comes from the last five days’ activity for Arise Technologies (TSX: APV), an Ontario-based solar outfit. Yet it only took one day for the stock to rocket 170% — from $0.165 all the way to $0.445.

What could make a stock climb that high in just a few short hours?

Forecasting a two-fold jump in first quarter-revenue might do it. Announcing first-quarter solar shipments will increase six-fold might have something to do with it, as well. What benefited Arise this quarter was their location — being based in Ontario. It’s as simple as that. Earlier this year, the Ontario government awarded contracts for 510 new clean energy projects as part of massive push for greener energy in the region. Last week, Ontario announced an additional 184 new clean energy contracts. In total, 694 new cleantech projects have been announced. And you can bet Arise — with company headquarters in Ontario — is on the receiving end of some of those contracts. Hence, the uptick in sales forecasts. According to Reuters, those 694 solar, wind, water, and biofuel projects will power 600,000 homes, generating more than 2,500 megawatts of electricity. They’ll also create 20,000 green jobs and bring $8.9 billion in private sector investment to Canada’s most populated province.

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