Range Wars: There are many activists who decry the consumption of beef. The reasons include the resources cows consume, the wastes they produce, animal cruelty, how cattle degrade the landscape and water quality, on and on. And of course all of that belching and farting. But what about some of the other ruminants on the range? In the UK...
A government-sponsored study into greenhouse gases found that producing 2.2lb of lamb released the equivalent of 37lb of carbon dioxide.
The problem is because sheep burp so much methane, a potent greenhouse gas. Cows are only slightly better behaved. The production of 2.2lb of beef releases methane equivalent to 35lb of CO2. Tomatoes, most of which are grown in heated glasshouses, are the most “carbon-intensive” vegetable, each 2.2lb generating more than 20lb of CO2 Potatoes, in contrast, release only about 1lb of CO2 for each 2.2lb of food. The figures are similar for most other native fruit and vegetables.
Uhhh, potatoes aren't native to the UK, Ireland, or anywhere else in the Old World (previous blog here).
That tomato statistic highlights the fact that choosing local foods isn't necessarily better for the environment. FYI, the production of pork and chicken releases less methane than does mutton and beef. And let's not forget about the original reasons for ethanol production.
Alcoholic drinks are another significant contributory factor, with the growing and processing of crops such as hops and malt into beer and whiskey helping to generate 1.5% of the nation’s greenhouse gases.
And of course the UK doesn't have the weather to produce much wine.
Saving Brightness: People in many nations are used to judging the amount of light an incandescent bulb produces based upon its wattage. Yet, the watt is a measure of the power consumed, not the light emitted. The rise of more efficient bulbs has added confusion, as they produce more lumens--light that people can perceive--per watt than do incandescents.
In many instances, the solution has been to label the newer bulbs as being the equivalent of, for instance, a 60- or 100-watt incandescent bulb. However, this hasn't worked very well for a number of reasons (previous blog here). Maybe the following will be an improvement in the long run...though I'm sure the transition will be annoying for many consumers.
Lightbulbs are to lose their wattage markings, thanks to new European Union rules.
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When the changes take place bulbs will appear with the symbol Lm for Lumens instead of W for Watt. A 60W bulb, for example, will be given the label 800 Lm.
The EU will develop advertising to help make the transition easier. But with various fluorescent bulbs (and for that matter LEDs) producing different types and frequencies of light, the use of lumens won't eliminate apples-to-oranges comparisons.
Soon, 60W bulbs won't be available for another reason. Both the EU and the UK are phasing out the sale of most incandescent light bulbs. With the same thing occurring in the U.S. by 2014 (previous blog here), suppose we'll soon go through a similar labeling transition from watts to lumens?
Changing Hormones: 60 percent of women undergoing menopause claim that they experience memory problems during the transition. The following study attempted to document this by analyzing changes in the ability to learn, which obviously depends upon memory.
For a four-year period, researchers studied 2,362 women, who were between the ages of 42 and 52 had at least one menstrual period in the three months before the study started.
The women were given three tests: verbal memory, working memory and a test that measured the speed at which they processed information. Scientists tested the women throughout four stages of the menopause transition: premenopausal (no change in menstrual periods), early perimenopausal (menstrual irregularity but no "gaps" of 3 months), late perimenopausal (having no period for three to 11 months) and postmenopausal (no period for 12 months).
The study found that processing speed improved with repeated testing during premenopause, early perimenopause and postmenopause, but that scores during late perimenopause did not show the same degree of improvement. Improvements in processing speed during late perimenopause were only 28 percent as large as improvements observed in premenopause. For verbal memory performance, compared to premenopause, improvement was not as strong during early and late perimenopause. Improvements in verbal memory during early perimenopause were 29 percent as large as improvements observed in premenopause. During late perimenopause, verbal memory improvement was seven percent as large as in premenopause.
So, how does hormone therapy impact the results?
The study also found that taking estrogen or progesterone hormones before menopause helped verbal memory and processing speed. In contrast, taking these hormones after the final menstrual period had a negative effect: postmenopausal women using hormones showed no improvement in either processing speed scores or verbal memory scores, unlike postmenopausal women not taking hormones. "Our results suggest that the 'critical period' for estrogen or progesterone's benefits on the brain may be prior to menopause, but the findings should be interpreted with caution," said Greendale.
Low testosterone adversely impacts memory in men.
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