Dr Meacham said these were being taken by healthy people to increase concentration and focus.
Several years ago, Wrigley and The Princeton Review surveyed American and Canadian college students about their study habits and found that of the students who chew gum while studying for exams, 41% do so to combat stress while 23% do so to increase concentration.
However, this does give us the chance to mark the ongoing increase in CO2 concentration and talk about why it's a problem for the climate.
In what is, admittedly, the least-tested part of their thesis, Dr Unger and Dr Scherer argue that other cells react to this increase in leptin concentration by becoming resistant to the hormone's effects.
But the actual increase in its atmospheric concentration is a low exponent.
"Whilst investor appetite for radio assets is not exactly running high at the moment, due to the challenging advertising backdrop, separate management concentration on two completely different businesses should significantly increase the focus on recovery".
More spectrum concentration could mean even less customer choice and an increase in the cost of data plans.
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Climate sensitivity is a key parameter for estimating the long-term temperature increase expected from a doubling of the concentration of greenhouse gas emissions in the atmosphere.
The award winning Bengtsson, highly decorated by scientific bodies across the globe, also pointed out that the heating effect of carbon dioxide (CO2) is logarithmic, which means the higher the concentration is, the smaller the effect of a further increase.
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"Mould (on plants) can irritate asthma, increase upper respiratory problems, cause headaches and affect concentration, " Dr. David Miller an expert on indoor air quality from Carleton University, Canada told the Globe and Mail newspaper.
"Rising imports of oil and gas into OECD regions and developing Asia, together with the growing concentration of production in a small number of countries, would increase our susceptibility to supply disruptions and sharp price hikes, " Tanaka said.
Arrhenius predicted that if the carbon dioxide concentration increased, the mean temperature of the surface of the earth would increase, in pretty much the way he said it would.
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Retail jobs will be particularly hit given the concentration of those jobs in the Northeast and the seasonal adjustment that accounts for the increase in retail jobs ahead of the Holiday season.
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