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Thursday, 08 Jun 2006
Spore LosersClimate change could make pollen rise and allergies worsePerhaps you've heard the argument that a rise in carbon dioxide levels is a good thing, because CO2 helps plants grow. Well, says Hah-vard's Paul Epstein, "It is the opportunistic plants like poison ivy and ragweed that thrive." That's right, ye allergy-stricken: More CO2 means more pollen, according to a new study. Harvard researchers found that ragweed grown under conditions mimicking a warming globe produced about 55 percent more pollen than ragweed grown under current conditions. Climate change is already causing spring to arrive earlier in many places, but researchers wrote, "In future climates with elevated [CO2], we predict pollen production will be just as robust in years with late springs as in years with early springs." Super. Early spring does seem to have a side effect for wildlife, though: Italian scientists said yesterday that a variety of animals are coming out of hibernation early, causing them to stress out and lose weight. Good ol' global warming. Is there anything it can't do?
Stick With Pickles and Ice CreamPregnant women shouldn't eat canned tuna, says Consumer ReportsWe're all aware that pregnant women shouldn't overeat seafood because of mercury contamination, but the Consumers Union, publisher of Consumer Reports magazine, recommends that moms-to-be skip canned tuna altogether. Most canned light tuna is skipjack, a species relatively low in mercury, but a Chicago Tribune investigation late last year found that the tuna industry also uses yellowfin, which can contain mercury at a level the FDA judges unsafe for pregnant women. So while the average mercury level in canned tuna remains low, individual cans may contain dangerously high amounts. This discovery led Consumers Union to err on the side of caution. But the FDA and the tuna industry are singing a different tuna, maintaining that canned light tuna is low in mercury -- a position they took two years ago because, a top FDA official admitted, they wished to "keep the market share at a reasonable level." That's comforting.
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From the Archives
That Thing Utah Do!, 07 Jun 2006
The Great Pall of China, 06 Jun 2006
And the Sand Played On, 05 Jun 2006
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