But the results can be unsatisfying or even dangerous if the work is done poorly.
Some governments, moreover, may try to achieve a declared target even when changed conditions have made the mark impossible or even dangerous.
Almost all of the rest have proven ineffective or even dangerous.
Often, though, their lack of capital means they are unable to teach a broad curriculum, are short of books and other materials, and are stuck in unsuitable (or even dangerous) buildings.
On the other hand, if we buy shoes a size too large so that they are wide enough in the toes, the heel slips out, which can be annoying or even dangerous.
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Just snapping pictures on your smartphone can expose you to embarrassing, frustrating, creepy or even downright dangerous situations.
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Not saying it needs to get nasty or dangerous or even uncomfortable, but some friendly animosity would be welcome.
That said, it would be wrong to suggest that the two countries see eye-to-eye on all or even most big issues, or to rule out a dangerous falling-out in the future.
That can increase the risk of dangerous overdoses, and worsen or even trigger substance abuse problems.
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Burglary or dangerous driving cannot currently be subject to a prosecution appeal, even where a prosecutor believes that the sentence was too lenient.
One worry is that the new science of synthetic biology, the souped-up form of genetic engineering that involves radically modifying organisms or even someday designing them from scratch, is both more promising and more dangerous that the technology that has been around for two decades and gave birth to Amgen, Genencor, and Monsanto.
One worry is that the new science of synthetic biology, the souped-up form of genetic engineering that involves radically modifying organisms or even someday designing them from scratch, is both more promising and more dangerous that the technology that has been around for two decades and gave birth to Amgen (nasdaq: AMGN - news - people ), Genencor, and Monsanto (nyse: MON - news - people ).
But identifying precisely which of these listed toys contained the lead-contaminated paint or other dangerous features just from incomplete online listings turned out to be tricky even for a research organization.
Many foreigners asked about the well-being of their Japanese friends, even if their friends were based in Okinawa or Fukuoka, several hundreds of miles from the dangerous quake zone.
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It's dangerous, and almost certainly fruitless, to dwell on one month's trade statistics - or even three.
No promises on a commercial version just yet, but the researchers see plenty of potential for it, and are even talking about a portable, GPS-equipped version that police or emergency responders could use before entering a dangerous area.
ENGADGET: Researchers create Amazing X-Ray Wireless Network!
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