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Scientists say they have found the cleanest air on earth

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Aerosol filter samplers probe the air over the Southern Ocean on the Australian Marine National Facility's R/V Investigator ship.
In the first study of its kind on the composition of bioaerosols in the Southern Ocean, researchers from Colorado State University identified regions of the atmosphere that remained unchanged by human activity.
Weather and climate are closely interrelated, connecting every part of the world with other regions. As climate change quickly due to human activity, scientists and researchers struggle to find corners of the earth that are not affected by humans.

However, Professor Sonia Kreidenweis and her team suspected that the air above the Southern Ocean was least affected by humans and dust from the continents of the world.

The researchers found that the boundary layer of air, which feeds the lower clouds above the Southern Ocean, is free of aerosol particles produced by human activity. – including burning fossil fuels, growing certain crops, producing fertilizer, and disposal of wastewater – or transported from other countries around the world.

Air pollution caused by aerosols, which are particles and solid and liquid gases that are suspended in the air.

The researchers decided to study what is in the air, and where it came from, using bacteria in the air as a diagnostic tool to deduce the properties of the lower atmosphere.

Research scientist and research co-author Thomas Hill explains that “the aerosols that control the properties of SO (Southern Ocean) clouds are strongly linked to ocean biological processes, and Antarctica appears to be isolated from the spread of microorganisms to the south and the deposition of nutrients from the southern continent,” he said in a statement.

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“Overall, this shows that SO is one of the few places on Earth that has been slightly affected by anthropogenic activities,” he added.

The scientists tasted air at sea level – part of the atmosphere that has direct contact with the sea – while boarding a research ship traveling south to the Antarctic ice bank from Tasmania, Australia. The scientists then examined the composition of microbes in the air, which were found in the atmosphere and were often scattered thousands of kilometers by wind.

Using DNA sequencing, source tracking, and wind back trajectory scientist and first author Jun Uetake found that the origin of microbes came from the sea.

From the composition of microbial bacteria, the researchers concluded that aerosols from distant soil masses and human activities, such as pollution or soil emissions caused by land use changes, do not move south and into the air.

Scientists say that the results show a marked difference with all other research from the oceans in both the northern and subtropical hemisphere, which found that most microbes originated in the windward continent.

In the study, published Monday at Proceedings of the National Academy of Sciences journals, scientists describe the area as “truly pure.”

Air pollution has become a global public health crisis, and kills seven million people each year, according to the World Health Organization (WHO).

Research has shown that air pollution increases risk heart disease, stroke and lung cancer.

More than 80% of people living in urban areas who monitor air pollution are exposed to air quality levels that exceed WHO guidelines, the health organization said, and low and middle income countries suffer the highest exposure.

However, as research shows, air pollution can cross geographical boundaries, and affecting people hundreds of miles away from the place of origin.

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Thomas Gouveia remains the best Portuguese in the Swiss Challenge

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Thomas Gouveia remains the best Portuguese in the Swiss Challenge

Writing with Lusa

Tournament of the second European circuit.

Thomas Gouveia solidified his status as the best Portuguese in the Swiss Challenge this Saturday by finishing the penultimate day of the second European round robin in a group of 31st placed golfers.

Thomas Gouveia hit the card with 73 shots, one over par on the course, after two birdies (one under par hole) and three bogeys (one over), after making 71 shots in the previous two days for a total of 215.

Thomas Bessa needed 75 hits, three over par and tied for scarecrows, he finished 48th with 218 total, five short of Vitor Lopez, 60th with 223, after today needs 78, with just one bird . to fit five scarecrows and a double scarecrow.

The Swiss Challenge, which concludes on Sunday in Folgensburg, France, is still led by France’s Chung Veon Ko with a total of 206 shots, one short of Denmark’s Martin Simonsen in second place.

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Miguel Oliveira qualified eighth for the Japanese Grand Prix.

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Miguel Oliveira qualified eighth for the Japanese Grand Prix.

Portuguese rider Miguel Oliveira (KTM) qualified this Saturday in eighth position at the Japanese MotoGP Grand Prix, 16th of 20 races of the season, despite a last-minute crash.

The Portuguese from the Austrian brand set his best lap of 1.55.895 minutes, finishing 0.681 seconds behind fastest Spaniard Marc Marquez (Honda). France’s Johann Zarco (Ducati) was second with 0.208 seconds and South African Brad Binder (KTM) was third with 0.323 seconds.

“I had good speed and potential in the second quarter and on this particular lap. [a última], but I was on the floor in the ninth turn. It was a shame, but I have confidence in tomorrow (Sunday),” commented the Portuguese rider in statements released by the KTM team. “It was difficult to prepare for the race, but we’ll see.” [o que vai acontecer]”- concluded Miguel Oliveira.

The Portuguese left the third row of the grid after falling just three minutes before the end of the session, marred by rain that caused a delay of more than an hour and had already forced the cancellation of the third free game. training session, at night. The fall of the Portuguese rider occurred in the third sector of the track, at a time when his results were improving. When 15 minutes of this second qualifying stage (Q2) ended, Oliveira finished in fourth place.

However, several riders were still halfway to the last lap and the Almada rider ended up being overtaken by Spaniards Jorge Martin (Ducati), Brad Binder and Aprilia Spaniards Aleix Espargaro and Maverick Viñales.

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Pole position was won by Marc Marquez 1,071 days after he was the fastest in qualifying for the MotoGP World Championship, namely the 2019 Japanese Grand Prix.

“I am very pleased with the pole position. This morning I felt very strong on the wet track and decided to give it a try. This is very important for us and for the future. Tomorrow, on a dry surface, everything will be different. history,” said the Spanish rider, who has already become world champion eight times.

The rain that hit the Motegi track became a headache for the riders and the organization, which was forced to interrupt the Moto2 qualifying nine minutes before the end and cancel the third free practice in MotoGP.

Traffic on the track only resumed after more than an hour, and the wet track was the cause of several accidents, including that of a Portuguese KTM rider who slid off the pavement without physical consequences.

Johann Zarco’s Ducati was the fastest today, reaching 302 kilometers per hour, while Oliveira’s KTM lost 30 kilometers per hour in a straight line (the maximum speed achieved by the Portuguese was 270 kilometers per hour). Luca Marini’s Ducati was the slowest, reaching 255.9 kilometers per hour, leaving the Italian in 10th place.

Champion and championship leader Fabio Quartararo (Yamaha) of France finished ninth behind Miguel Oliveira, while World Cup runner-up Francesco Bagnaia (Ducati) of Italy finished 12th and last in the second quarter, bringing together the top 10 fastest in free practice and the top two in the first quarter.

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Already the Italian Enea Bastianini (Ducati), the winner of the previous stage in Aragon, remained in Q1, where he fell without physical consequences.

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Arapiraquense makes humorous videos to give Portuguese advice: “You learn and laugh” | alagoas

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Arapiraquense makes humorous videos to give Portuguese advice: "You learn and laugh" |  alagoas

“You learn and you laugh” is how Erivaldo Amancio defines the Portuguese language content he offers online. Born in Arapiraque, Alagoas, he humorously gives advice and answers questions about the Portuguese language.

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Erivaldo has 767k followers on Instagram and over 17.5k followers on YouTube. It all started a year and a half ago when he got scolded in a comment on social media.

Because the swearing contained several grammatical errors, Erivaldo responded by posting a video teaching a “lesson” to the hater.

“It happened more than once. Some of these videos were posted on humorous Instagram profiles. It made me stand out,” he said.

A literature student at the Federal University of Alagoas (Ufal), Erivaldo wants to prepare even more for face-to-face classes when he is near the end of the course. He says the purpose of the profile is to encourage followers to seek out more knowledge.

“Tips on the web are just a seed, the fruit of which can be curiosity about objects,” he explained.

Through social media, Erivaldo responds to his followers’ doubts about the Portuguese language.

Erivaldo’s profile is also in demand by contestants and students preparing for Enem.

“[Os seguidores] it is said to be a very interesting way of learning. Many regret not learning from teachers who use humor in the classroom,” he said.

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