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...that doesn't mean that every urban resident is at higher risk of heart disease. For most healthy people, the exposure to city air and transient changes in blood pressure isn't dangerous. But, says Brook, "it's plausible that if someone has underlying hypertension or coronary disease, then these changes in blood pressure and blood-vessel function might be exaggerated and might even trigger a heart attack. The levels at which we encounter these particles today is still dangerous to people who are unhealthy and at high risk." (See pictures of the effects of global warming...
...average North American city contains about 14 micrograms of particles per cubic meter of air - a vast improvement, thanks to clear-air laws, over the amounts found more than a decade ago. Brook's team studied much higher exposures to particulates, in the order of 150 micrograms per cubic meter, but notes that on many days, cities such as Los Angeles and Pittsburgh and Detroit often reach these levels. (The Environmental Protection Agency deems anything between 151 and 200 micrograms per cubic meter to be unhealthy.) But it's hard for the average city denizen to know when particulate levels...
FlyBy: Here’s a good one, one guy asked why the cost of higher education now outpaces the standard of living?...
...away, but yet choose not to. It is this ability to make such a choice that defines who we are as human beings. Indeed, what other creature acts in a manner that initially seems so detrimental to its own well-being, with the sole purpose of achieving a higher, perhaps not readily comprehensible goal...
...proposal was necessary, wrote Monaco's Prince Albert in a letter published in the Wall Street Journal, because ICCAT had failed to protect the tuna population, setting quotas higher than those recommended by its own scientists and turning a blind eye to illegal fishing. CITES would be a more appropriate regulatory body than ICCAT, Albert noted, because it "is presided over by trade and environment ministers, rather than fisheries ministers...