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Smog Free Project
Smog Free Project

This Giant Air Purifier Turns Smog into Jewelry

Smog Free Project
Smog Free Project

Designer Daan Roosegaarde believes his innovation—which he dubs "the world’s largest smog vacuum cleaner”—can change the air quality in polluted areas forever. Called The Smog Free Tower, the device stands 23 feet high and is wind-powered. Using a patented ion technology—it emits positive ions that attach to smog particles, then draws the particles back in with negative ions—the machine can filter 1.06 million cubic feet of air every hour, creating a "bubble" free of contaminants for anyone within close proximity of the machine. (It's unclear how big this bubble is exactly.) 

But that's not all the machine does. Once inside the tower, the particles (which include carbon) are compressed into solid fragments that are later encased in resin to make smog jewelry, like cufflinks and rings. The trinkets were used as a Kickstarter incentive for the project’s fundraising earlier this year.

Smog Free Project

Roosegaarde has cautioned that the device is not a cure-all for areas with serious air quality problems, but can offer a small area of refuge for cities burdened by excessive pollution. After a trial run in Rotterdam, the tower will go to Beijing and other areas in China beginning in September. In the near future, Roosegaarde hopes to bring the technology to other locations, including Mexico City and Los Angeles.

[h/t IFL Science]

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Health
Sleeping In on Weekends May Help You Catch Up on Sleep After All
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Weekend mornings are a precious time for nine-to-fivers. If you spend your weekdays staying up long past reasonable bedtime hours and waking up with the Sun, you may be tempted to sleep past noon every day off you get. Sleeping in feels great, and now a new study from sleep scientists at Stockholm University's Stress Research Institute finds that it may also be an effective way to make up for the sleep you missed during the week, contradicting previously held beliefs on the matter.

According to most sleep researchers, the only way to catch up on sleep debt is to adjust your sleeping patterns gradually over time—in other words, cramming in all the sleep you missed last week into a night or two won't cut it. A team of scientists reexamined this theory for their study published in the Journal of Sleep Research [PDF]. Researchers looked at the sleep data from about 44,000 Swedish adults collected in 1997 and followed up with the participants 13 years later. Accounting for factors like age, gender, and education, they report that adults who consistently slept for five hours or fewer throughout the week were more likely to have died after those 13 years than subjects who slept for six or seven hours, seven days a week. Oversleeping every day of the week also put participants at a greater risk of mortality.

But there's good news for people who do all their sleeping in on the weekend—subjects who under-slept five days and slept more during the last two days of the week had no greater risk of death than the people who got healthy amounts of sleep every night of the week. The results call into question past sleep studies that have only looked at sleep patterns during the week, ignoring weekend behaviors. The new study, though, focuses just on the sleeping habits of people at a specific point in time. To confirm what these results suggest, more long-term studies will need to be conducted.

Earlier mortality isn't the only health risk associated with unsatisfactory sleep habits: Getting too little or poor-quality sleep can mess with your memory, appetite, and cognitive and motor performance. That means finding time to get a good night's sleep, no matter the day of the week (if you're lucky enough to have the option), is still the healthiest course of action.

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People With Type A Blood Are More Prone to Severe Diarrhea
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Bad news for people with type A blood who also love to eat at buffets: A new study spotted by Science News reveals that people with this particular blood type have a significantly higher risk of contracting severe diarrhea from a common bacterial pathogen.

Researchers at the Washington University School of Medicine discovered that a protein secreted by a strain of Escherichia coli latches onto sugar molecules that are only found within the blood cells and intestinal lining of people with type A blood.

For the study, 106 healthy volunteers drank water that contained a strain of the bacterium E. coli—one of the major causes of infectious diarrhea around the world. Only 56 percent of volunteers with blood types O and B contracted moderate to severe diarrhea, but 81 percent of volunteers with blood types A or AB fell ill. All participants were later given antibiotics.

Researchers say these findings, which were published in the Journal of Clinical Investigation, could aid the development of an effective vaccine. Developing parts of the world are particularly susceptible to E. coli contamination, which causes millions of infections and hundreds of thousands of deaths each year, researchers note.

As anyone who has ever had "Delhi belly" can attest, this is also a concern for people who travel to developing regions. The main causes of E. coli infection are contaminated food and water, so it's wise to regularly wash your hands and avoid eating raw produce and undercooked beef while traveling.

[h/t Science News]

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