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Why Do Fire Stations Still Use Sirens?

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Growing up in southwestern Pennsylvania, I lived next to railroad tracks and a fire station. Coal-carrying trains, which rumbled through town at all hours of the day and night, could be tolerated. But occasionally I’d be startled awake by the deafening wail of a fire siren.

With the advent of modern technology and advanced emergency notification systems, are sirens still necessary? It isn't just me who wondered this, either; communities across the country have been raising the same question at their local meetings, with some addressing the issue as early as the 1990s. As it turns out, sirens technically aren’t necessary, and whether or not they’re used at all is a local decision, according to the National Volunteer Fire Council.

Although no law mandates their use, many departments have fought to keep them in place, despite complaints from annoyed residents. Chris Hash, of the Easton Volunteer Fire Department in Maryland, wrote in a blog post that sirens are needed because other communication devices, like pagers and cell phones, are not infallible.

“Batteries die, pagers and cell phones are not on the person, and text messaging and smartphone apps like Active 911 are often delayed, with some calls not coming through at all,” Hash wrote. “The National Fire Protection Association recommends that there are at least two reliable means to alert firefighters [of an emergency].”

Plus, there’s no missing or mistaking a fire siren. "When you're out working in the yard on a lawn mower, you can't hear your pager, but you can hear that siren,” George McBride, a member of the Hillcrest Volunteer Fire Department in Mechanicville, New York—where a debate arose over whether to replace a siren that had been disconnected—told the Times Union in 2014.

In addition to notifying firefighters of an emergency, the siren is also used to let local residents know they should remain alert. Some advocates of the fire siren argue that it lets drivers and pedestrians know they should stay off the roads, and residents with sprinklers are reminded to turn them off to conserve water.

One fire department in Mitchell, Ontario, hadn’t used its fire siren in nearly a decade, but after a firefighter nearly struck a pedestrian while driving to the fire hall, the town decided to start using it again earlier this year. Another department in Calistoga, California, considered purchasing a siren in the aftermath of a deadly wildfire, even though they had gotten rid of it years before in response to noise complaints.

More have joined suit. Duncan Scott, a sales manager at Federal Signal, told the Napa Valley Register in April that departments from all over California have placed orders for sirens after a number of wildfires swept through the state.

Other communities have struck a balance by keeping their sirens, but limiting their usage during hours when most people are sleeping. Of course, in some small towns, sirens still sound daily at noon or sundown—a holdover from a time when sirens were used to let residents know when it was time for lunch or for their children to come inside. Some communities keep this going for the sake of tradition.

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Big Questions
What Do Morticians Do With the Blood They Take Out of Dead Bodies?
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Zoe-Anne Barcellos:

The blood goes down the sink drain, into the sewer system.

I am not a mortician, but I work for a medical examiner/coroner. During an autopsy, most blood is drained from the decedent. This is not on purpose, but a result of gravity. Later a mortician may or may not embalm, depending on the wishes of the family.

Autopsies are done on a table that has a drain at one end; this drain is placed over a sink—a regular sink, with a garbage disposal in it. The blood and bodily fluids just drain down the table, into the sink, and down the drain. This goes into the sewer, like every other sink and toilet, and (usually) goes to a water treatment plant.

You may be thinking that this is biohazardous waste and needs to be treated differently. [If] we can’t put oil, or chemicals (like formalin) down the drains due to regulations, why is blood not treated similarly? I would assume because it is effectively handled by the water treatment plants. If it wasn’t, I am sure the regulations would be changed.

Now any items that are soiled with blood—those cannot be thrown away in the regular trash. Most clothing worn by the decedent is either retained for evidence or released with the decedent to the funeral home—even if they were bloody.

But any gauze, medical tubing, papers, etc. that have blood or bodily fluids on them must be thrown away into a biohazardous trash. These are lined with bright red trash liners, and these are placed in a specially marked box and taped closed. These boxes are stacked up in the garage until they are picked up by a specialty garbage company. I am not sure, but I am pretty sure they are incinerated.

Additionally anything sharp or pointy—like needles, scalpels, etc.—must go into a rigid “sharps” container. When they are 2/3 full we just toss these into one of the biotrash containers.

The biotrash is treated differently, as, if it went to a landfill, then the blood (and therefore the bloodborne pathogens like Hepatitis and HIV) could be exposed to people or animals. Rain could wash it into untreated water systems.

This post originally appeared on Quora. Click here to view.

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Why Does Asparagus Make Your Pee Smell Funny?
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The asparagus has a long and storied history. It was mentioned in the myths and the scholarly writings of ancient Greece, and its cultivation was the subject of a detailed lesson in Cato the Elder's treatise, On Agriculture. But it wasn't until the turn of the 18th century that discussion of the link between asparagus and odorous urine emerged. In 1731, John Arbuthnot, physician to Queen Anne, noted in a book about food that asparagus "affects the urine with a foetid smell ... and therefore have been suspected by some physicians as not friendly to the kidneys." Benjamin Franklin also noticed that eating asparagus "shall give our urine a disagreeable odor."

Since then, there has been debate over what is responsible for the stinky pee phenomenon. Polish chemist and doctor Marceli Nencki identified a compound called methanethiol as the cause in 1891, after a study that involved four men eating about three and a half pounds of asparagus apiece. In 1975, Robert H. White, a chemist at the University of California at San Diego, used gas chromatography to pin down several compounds known as S-methyl thioesters as the culprits. Other researchers have blamed various "sulfur-containing compounds" and, simply, "metabolites."

More recently, a study demonstrated that asparagusic acid taken orally by subjects known to produce stinky asparagus pee produced odorous urine, which contained the same volatile compounds found in their asparagus-induced odorous urine. Other subjects, who normally didn't experience asparagus-induced odorous urine, likewise were spared stinky pee after taking asparagusic acid.

The researchers concluded that asparagusic acid and its derivatives are the precursors of urinary odor (compared, in different scientific papers, to the smell of "rotten cabbage," "boiling cabbage" and "vegetable soup"). The various compounds that contribute to the distinct smell—and were sometimes blamed as the sole cause in the past—are metabolized from asparagusic acid.

Exactly how these compounds are produced as we digest asparagus remains unclear, so let's turn to an equally compelling, but more answerable question:

WHY DOESN'T ASPARAGUS MAKE YOUR PEE SMELL FUNNY?

Remember when I said that some people don't produce stinky asparagus pee? Several studies have shown that only some of us experience stinky pee (ranging from 20 to 40 percent of the subjects taking part in the study, depending on which paper you read), while the majority have never had the pleasure.

For a while, the world was divided into those whose pee stank after eating asparagus and those whose didn't. Then in 1980, a study complicated matters: Subjects whose pee stank sniffed the urine of subjects whose pee didn't. Guess what? The pee stank. It turns out we're not only divided by the ability to produce odorous asparagus pee, but the ability to smell it.

An anosmia—an inability to perceive a smell—keeps certain people from smelling the compounds that make up even the most offensive asparagus pee, and like the stinky pee non-producers, they're in the majority.

Producing and perceiving asparagus pee don't go hand-in-hand, either. The 1980 study found that some people who don't produce stinky pee could detect the rotten cabbage smell in another person's urine. On the flip side, some stink producers aren't able to pick up the scent in their own urine or the urine of others.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

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