Ecology

inversione fiume chicago

At the beginning of the 20th century, Chicago reversed the course of its river to save the city from pollution

Atbeginning of the 20th centurythe city of Chicago (USA) had to face a great environmental challenge caused by its urban and industrial growth: the river which crosses the city had transported up to theAug Michiganthe main water supply of the entire area, including Chicago, such a quantity of pollutants and other toxic substances to contaminate the waters of the basin. ...

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New wave of trading scams on WhatsApp: how to recognize them and defend yourself

The online trading scamsoften conveyed through WhatsApprepresent a constantly evolving threat to web users. Despite the efforts of the authorities to contain them, these frauds continue to have some success by exploiting the popularity of online investments, the fascination of cryptocurrencies and the lack of public knowledge on these issues. Promises of easy money, apparently professional platforms and psychological manipulation ...

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The disastrous Arctic balloon expedition of 1897

The end of the flight. Credits: Scott Polar Research Institute No, the story we are about to tell you did not come out of a novel by Jules Verne: in 1897 there really was a Arctic hot air balloon expedition to the North Poleand it was ruinous from start to finish for several reasons. The hydrogen balloon and those on ...

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BlueSky and Threads could redefine the concept of “social network”: here’s how

BlueSky And Threads are emerging as two of the most promising alternatives to what was once the dominant text-based social networking platform: Twitter (now known as X). Both services, however, represent very different visions of the future of online interactions. While Threads aims for a centralized and Meta-controlled model, BlueSky takes a decentralized and democratic approach, giving users more freedom ...

palazzo di kiruna

Why are they moving the city of Kiruna to Sweden and how are they doing it?

Kirunaa city located in northern Sweden approximately 200 km north of the Arctic Circle, is the protagonist of a extraordinary and unique project in the world, started in 2007. This town, of approx 20,000 inhabitants, will be moved approximately 3 km further east. In short, a walking city! More than 3,000 buildings and houses will be relocated, many others have ...

haka danza maori storia origine significato

What is the haka, the typical New Zealand dance, and what is its meaning

There haka it’s one traditional Maori dance which has its roots in centuries of history and culture of New Zealand. Although today it is often associated with sporting events, such as the rugby (famous is the one danced by All Blacks before each match), the haka is much more than a simple performance: it is a profound ritual and significant ...

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How much you can drink to avoid exceeding the blood alcohol level required by the Highway Code: the tables

The new Highway Code came into force last December 14, 2024 introduced more severe penalties for driving while intoxicated, keeping the legal blood alcohol limits unchanged. This tightening has generated a lot concern among motoristswho now fear that they will no longer be able to drink even a beer for fear of legal and financial consequences resulting from any infringements. ...

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India removes toxic waste 40 years after the Bhopal disaster: 337 tons of waste removed

337 tons of toxic waste produced by Bhopal disasterin India, the most serious industrial accident in history occurred on the night between 2 and December 3, 1984have only now left the area – 40 years after the tragedy – with a journey of more than 200 km, headed towards a incineration plant in the Indian city of Pithampur. The decision ...

pop pop snappers fulminato di argento

How the “pop pop” firecrackers used on New Year’s Eve work: the chemistry of the explosion

THE pop pop snappersalso called “spring onions”, “paper balls” or “greaves”, are small firecrackers which, when slammed on the ground with sufficient force, cause a small explosion. These paper balls are widely used for New Year’s Eve celebrations, but how exactly do they work? If we open one, we discover that there are some inside pebbles and one gray powder. ...