Green Jobs: in crescita del 53% le offerte di lavoro legate alla transizione ecologica

Negli ultimi tre anni, in Italia, le offerte di lavoro che afferiscono ai cosiddetti “green jobs” – ovvero a tutte quelle posizioni correlate alla tutela del pianeta e allo sviluppo sostenibile – sono cresciute del 53% su Indeed, portale n°1 al mondo per chi cerca e offre lavoro.

In crescita esponenziale, gli annunci per posizioni legate alle energie rinnovabili (+ 394%) e a professioni più genericamente legate alla sostenibilità (+141%). Più che raddoppiate le offerte per addetti nel settore del riciclo (+112%). In crescita, anche se in misura più contenuta, gli annunci che contengono riferimenti specifici all’ambiente e all’ecologia (+ 60%) o al solare (+29%). Stabili gli annunci relativi a posizioni legate al trattamento delle acque (+1%).

I lavori sono i più diversi. Si va da professioni emergenti, come il “mobility manager”, o prettamente tecniche, come quelle legate all’efficientamento energetico, a professioni tradizionali che oggi richiedono anche competenze legate alla sostenibilità. Si pensi, ad esempio, all’eco-designer o, ancora, all’avvocato esperto di ESG o agli esperti di bio-architettura e bio-edilizia.

Gianluca Bonacchi, Recruitment insight Expert di Indeed commenta “la tutela del pianeta e ancora di più la transizione energetica si stanno rivelando degli importanti generatori di posti di lavoro. Negli ultimi tre anni, la ricerca di professionalità afferenti a queste aree da parte di aziende e organizzazioni è aumentata significativamente. Al contrario, non abbiamo registrato un altrettanto marcata crescita di interesse per queste posizioni da parte di chi è in cerca di lavoro”.

A fronte di un aumento delle ricerche per posizioni legate, ad esempio, alla sostenibilità (+59%), le ricerche di lavoro con parole chiave legate all’area semantica dell’ecologia e della tutela ambientale sono complessivamente diminuite (-13%).

Continua Bonacchi “Se ne discute molto ma le persone non hanno ancora davvero contezza delle possibilità di lavoro legate alla tutela ambientale e degli sbocchi occupazionali che offre. Manca consapevolezza, da un lato, e bisogna investire per favorire la diffusione delle competenze, dall’altro. Scuole e università stanno già puntando molto su corsi e master dedicati, rivolti sia ai giovani che devono fare il loro ingresso sul mercato del lavoro, sia ai manager che dovranno occuparsi dell’innovazione e sviluppo aziendale. È importante che anche le aziende si attivino. Sia per creare consapevolezza sui ruoli offerti e sulle mansioni richieste, sia per formare i propri talenti”.

“Siamo anche consapevoli che la sostenibilità e il modo in cui le aziende raccontano come stanno affrontando queste questioni è un fattore importante, le persone sono sempre più esigenti anche rispetto al posto in cui lavorano e vogliono che i valori aziendali riflettano i loro valori personali. Sta crescendo anche l’impegno in chiave sostenibile che molte aziende attuano anche internamente, un impegno che spesso vede il coinvolgimento di team specifici per capire come diventare più sostenibili” conclude Bonacchi.

Fonte: comunicato stampa

Extremely quiet fans can improve our health

Today, we spend as much as 87% of our lives indoors, according to an American study. The quality of indoor environments has therefore become an increasingly important factor for health and well-being. Temperature, carbon dioxide levels and humidity are just some of the factors known to influence our indoor environments, but lately, studies have also shown how indoor noise can have a significant negative impact.

One contributing factor to the constant noise in indoor environments is the fans used in ventilation systems in homes, workplaces, and schools. The core of the problem – and what irritates the human ear – occurs when the fan blades rotate, generating a sound with a consistent and predictable frequency, known as a ‘tonal’ noise. Identifying exactly how this sound occurs, and how to remove it, has been a long-standing quest that researchers and fan manufacturers have not been able to find an answer to.

“The source of the tonal sound has never before been identified on this type of fan. When you can reduce this tone, the fans become extremely quiet and, in that respect, unique. This is the first time someone has succeeded in both identifying and eliminating the source of the noise,” says Martin Ottersten, industrial PhD student in Fluid Dynamics at Chalmers University of Technology and Research and Innovation Engineer at Swegon, and lead author of the study.

Increased risks of physical and mental illness

According to a report from the WHO, tonal noise of the kind that occurs in ventilation systems can negatively affect human health. The study shows that long-term exposure to this kind of sound increases the risk of high blood pressure, cardiac arrest, tinnitus, hearing damage, sleeping problems and stress. Children’s cognitive development can also be negatively affected by the noise levels stemming from ventilation systems.

Finding the source of what causes the tonal sound has therefore been of great interest to researchers and fan manufacturers for many years.

“I am sensitive to sound and sometimes have difficulty concentrating and sleeping with disturbing sounds. And I know that tonal sound can disturb our brain. When I read the WHO’s reports on how tonal sound can also lead to diseases such as high blood pressure and even cardiac arrest, the work took on a whole new dimension,” says Martin Ottersten, who has worked with the project for four years.

Lower energy usage another benefit

With the help of advanced computer calculations, sometimes lasting weeks at a time, Martin Ottersten was able to study how air flows through the fan during rotation and where turbulence occurs. The calculations also provided audio data for the fan, which was used to locate the source of the tones.

After several variations, he managed to design a fan in such a way that the tonal sound decreased drastically, an improvement which could allow for much quieter and healthier indoor environments.

“By trying out different modifications to the fans and measuring the sound levels using very complex calculations on hundreds of computers, over several weeks, we could determine exactly where in the fan’s construction the tonal sound originated and how to eliminate it. And what is more, we also observed that the efficiency of the fan increases as the tonal sound decreases,” says Martin Ottersten.

He believes that this research now has great potential to be put into practice, and that extremely quiet fans which do not produce tonal noise could soon be commercially available.

“We are currently seeking a patent for this technology and implementing it into our fans. After that we want to get them out to market, so that we can contribute to creating healthier indoor environments – as well as helping reduce energy consumption and carbon dioxide emissions.

The results of the study A numerical method to predict and minimize fan tonal noise” have been published in the scientific journal Physics of Fluids.

The study was carried out at the Division of Fluid Dynamics at the Department of Mechanics and Maritime Sciences, Chalmers University of Technology and was financed by Swegon AB.

More about the different types of sound generated by fans

Sound from fans consists of two types of sound: broadband and tonal sound. The broadband sound is heavier, but it’s the tonal sound – which is regular and reoccurring – that irritates and affects us humans the most. To reduce noise levels in workplaces, homes and schools, silencers are therefore installed so that people can stay in the premises for a longer period of time. These mufflers remove much of the broadband sound but are not as good at absorbing the more harmful tonal sound. In addition, the mufflers contribute to increased energy consumption and higher carbon dioxide emissions.

Source: press release
Photo: Chalmers University of Technology