Should a notorious Buenos Aires slum become an official neighbourhood?

Turning Villa 31 into a barrio will bring greater stability and prosperity, say city authorities, but the plan is stirring deep resentments about ownership and identity

For many Argentinians, especially those from Buenos Aires, Villa 31 is a household name. It is the most famous – and notorious – slum in Buenos Aires, synonymous with poverty and violence (it has the second-highest murder rate in the city), and with the narcotráficantes (organised drug gangs) and paco, a cocaine paste that destroys communities in Argentina.

As inflation climbed to 55% last year and the national poverty rate crept to 32%, the neighbourhood lurched further into the grip of gangs, such as the Sampedranos. Murder stories from the villa dominate headlines, the most recent one being the discovery of a woman’s dismembered corpse in March.

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Oil built Saudi Arabia – will a lack of water destroy it?

As Riyadh continues to build skyscrapers at a dizzying rate, an invisible emergency threatens the desert kingdom’s existence

Bottles of water twirl on the conveyor belts of the Berain water factory in Riyadh, as a puddle of water collects on the concrete floor. In a second warehouse, tanks emit a low hum as water brought in from precious underground aquifers passes through a six-stage purification process before bottling.

“In Saudi Arabia there are only two sources of water: the sea and deep wells,” says Ahmed Safar Al Asmari, who manages one of Berain’s two factories in Riyadh. “We’re in the central region, so there are only deep wells here.”

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Suburb in the sky: how Jakartans built an entire village on top of a mall

Depending who you ask, Cosmo Park is an ingenious urban oasis or an ill-conceived dystopia

It’s Thursday and the residents of Jakarta’s Cosmo Park are out jogging, watering their plants or walking their dogs along neat asphalt roads.

Neighbourhood kids pedal their bikes under frangipani trees and peach-coloured bougainvillea to the pool and tennis court. Apartments, comfortable and modern, sit side by side, with barbecues and toys stacked outside.

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Turf it out: is it time to say goodbye to artificial grass?

It’s neat, easy – and a staggering £2bn global market. But as plastic grass takes over our cities, some say that it’s green only in colour

If your attention during the Women’s World Cup was on the pitch rather than the players, you might have noticed that the matches were all played on real grass. That was a hard-won change, made after the US team complained to Fifa that they sustained more injuries on artificial turf.

In private gardens, however, the opposite trend is happening: British gardens are being dug up and replaced with plastic grass. But this isn’t the flaky, fading stuff on which oranges were once displayed at the greengrocer. Today’s artificial grass is nearly identical to the real thing.

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Left to rot: the new global effort to preserve lost monuments

From a railway run by children in Ljubljana to brutalist monuments in the Balkans, the Nonument Group maps abandoned 20th-century architecture

When he was 14, Ljubljana resident Janko Vrhunc spent every Sunday training to drive a steam locomotive. “We had to sign in, then check all the wagons, check the train, then talk to all the workers,” recalls Vrhunc, now 84. “I asked the train driver: is the fire strong enough? I asked the conductor: did we sell enough tickets to depart? Are the uniforms in order?”

After three months Vrhunc and about 20 other schoolchildren were deemed ready to run the small-gauge Pioneer Railway under adult supervision. “We moved the train from Ljubljana main station,” says Vrhunc. “The train driver stepped aside and let us do it. This is how … one of us fell under the wheels and lost a leg.”

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I followed the advice for Paris’s hottest day – it didn’t help | Megan Clement

From walking the dog at midnight to a dip in the canal, I tested the heatwave plan as the city reached 42.6C. Here’s how it went

Last week, as Paris faced down its hottest day since records began, the city authorities declared their readiness. Since the notorious heatwave of 2003 that killed thousands across France, the capital has put in place a heat strategy: cooling areas, a checking system for vulnerable people, shady parks kept open all night.

Could these strategies actually work against a predicted record temperature of 42C (107.6F)? A study released this week shows that the world has never warmed faster than now. By 2050, the average temperature in the hottest month in Paris will rise by six degrees. This heatwave might be the new normal.

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Redesigning Delhi’s Champs Élysées: ‘It represents all that’s complex about urban India’

From heaving traffic and dense crowds to car-free and tranquil: that’s the vision for Chandni Chowk. But is it achievable?

The Champs Élysées is one of the most famous streets in the world, but you could say the French were beaten to it by the Mughals. About 15 years before the avenue was laid out in 1667 in Paris, India’s Mughal emperor Shah Jehan built a grand mile-long street in his capital to reflect the glory of the empire at its height.

It ran from Fatehpuri mosque at one end to the colossal Red Fort at the other and was lined with trees, elegant mansions, mosques and gardens. Provisions for the Red Fort, the imperial residence, were carried down the boulevard by elephants, camels and horse-drawn carriages.

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Hungry herons and the great otter comeback: the wildlife of canals

A guide to species you might spot on Britain’s urban waterways

Canals are often seen as a kind of second-class version of a river. Perhaps that goes back to their industrial history, but from a wildlife point of view canals and rivers are more or less interchangeable.

Visit a city canal on a fine, sunny day in spring or summer, and you’ll see plenty of dragonflies and damselflies on the wing. Some, such as the red-eyed damselfly, banded demoiselle and scarce chaser, have a special preference for the slow-flowing water of a canal, sometimes perching on waterlilies in the sunshine.

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Toilet chat and double-mooring: a guide to canal etiquette

In the boating community, being a good neighbour is a must – here’s how to keep the peace

The boating community is growing rapidly, particularly in London. As a result, pressure on mooring spaces and facilities is also growing – making it more important than ever to be a good neighbour in order to make the life aquatic harmonious for everyone.

The general rule is: if someone is outside their boat, say hello. And be prepared to chat about your toilet – boaters love to talk about how they dispose of their waste. Whether you have a pump out, cassette or compost, it’s the quickest way to bond with another boater over a beer on the deck.

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Don’t stare too long: why our feral, polluted canals are so beguiling

An urban waterway is more than just a short cut through the city – it’s a testament to the power of nature over neglect

The roar of the road is receding with each step down and with it the light is changing; it is dancing, mirrored and then dappled in the ripples of the water. One layer down and the city has become an entirely different place.

I, like many, am using the canal as a quiet cut-through. It smells different down here; there’s the dankness of the water, for sure, but there’s a wealth of green filtering the fumes from above. And the soundscape changes – song birds, the curious grunt of a bank of geese eyeing me and the dog warily, the lap of the water’s edge and the groan of metal sidings that are there to repair the bridge.

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The canal revolution: how waterways reveal the truth about modern Britain

The remarkable transformation of canals is a global phenomenon and the ultimate symbol of how our cities have changed – for good and ill

Every second Monday of the month, a small group of volunteers meets in the training room of a Birmingham supermarket. They discuss what has long seemed to many of their friends a crazy and probably doomed idea: how to excavate a contaminated 40-year-old waste dump, create an urban marina, restore three miles of derelict canal and build several new bridges and locks.

Last month, however, the meeting of the 18-strong Lapal Canal Trust committee was joyous. After 20 years of trying to restore this short stretch of the 200-year-old Dudley No 2 canal, permission had finally been granted, they were told.

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Netherlands and Belgium record highest ever temperatures

All-time records in Germany and Luxembourg could also fall in continent-wide heatwave

The Netherlands and Belgium have recorded their highest ever temperatures as the second extreme heatwave in consecutive months to be linked by scientists to the climate emergency advances across the continent.

The Dutch meteorological service, KNMI, said the temperature reached 39.1C (102F) at Gilze-Rijen airbase near the southern city of Tilburg on Wednesday afternoon, exceeding the previous high of 38.6C set in August 1944.

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Are motorcycle taxis making the Ebola crisis worse?

The Congolese trading city of Butembo relies on its ‘taxi-motos’ to keep business running, but the taxi unions are resistant to helping government Ebola efforts – and their bikes could be spreading the disease

Swarms of motorcycle taxis overloaded with passengers and goods weave their way through traffic in the eastern Congolese city of Butembo. Motorbikes far outnumber four-wheeled vehicles on the dusty roads of the regional trading hub, especially downtown, where drivers laden with cargo carve their way through crowded street markets.

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The jungle metropolis: how sprawling Manaus is eating into the Amazon

Informal settlements are expanding, with a new occupation attempt every 11 days, and the threat to the rainforest is severe

Antonio Pinto’s makeshift home on the outskirts of Manaus is an open-air shack, one of dozens of similar dwellings of timber and tarpaulin scattered around the hills.

Around them is the evidence of the use of flame and iron: the hills are scorched and brown, littered with fallen logs and toppled, twisted trees.

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An ‘oasis’ for women? Inside Saudi Arabia’s vast new female-only workspaces

The kingdom has long been a man’s world, where women have the legal status of children. Do the latest reforms represent progress – or a PR exercise?

At the Luna food factory on the south-east outskirts of Jeddah, Mashael Elghamdi sits at her computer in an artfully ripped AC/DC T-shirt and jeans. The faint whirr of machines processing cans of beans, cream and evaporated milk can be heard over the sound of eight women typing and sometimes laughing. A screensaver of a smiling Cameron Diaz gazes out from one corner of the room. This is an all-female office. And because there is no need for the full-length abayas women are legally required to wear when interacting with men at work or in public, it is a riot of colour.

On the factory floor below, women in custom-made overalls on an all-female production line apply labels to cans. “All the women you see here do everything themselves,” says supervisor Fatima Albasisi, who oversees 90 workers. A staircase and a corridor separate the female factory workers from their male counterparts, while the men-only offices are in a different building. “If there’s a problem with the machines, they can fix it,” Albasisi adds. “If I could, I’d have a factory entirely run by women, no men at all. In my experience, women show up to work on time and make fewer mistakes.”

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Ministry of cities RIP: the sad story of Brazil’s great urban experiment

How an urbanist dream of fixing Brazil’s chaotic metropolises became a nightmare

Inside Maria Cleudimar da Silva’s flat, gospel music plays softly on the stereo, family photos and religious posters decorate the walls, and a wicker rocking chair and computer furnish the living room. The only evidence of her past life is a faded photo of the home she lived in for 11 years, a shack she called Noah’s Ark for its frequent floods.

She moved in in 1996, pursuing the promise of a better life from Brazil’s rural north-east to São Paulo, its largest city, where she settled in Paraisópolis, the city’s largest favela.

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A city suffocating: most polluted city in Americas struggles to change

Wood smoke smothers Coyhaique, Chile, in June and July. Yet despite the WHO ranking its air worst in the Americas, residents are reluctant to alter their habits

Photographs by Claudio Frías

“I was born and raised beside a roaring fire,” says Yasna Seguel proudly, as wet snowflakes tap against the kitchen window behind her and orange flames warm an outstretched palm. A tobacco-yellow stain soaks into the table cloth as she sets her mate gourd down to select a fresh log for the fire.

Every evening through the bitterly cold winter months of June and July, the southern city of Coyhaique, the most populous in the region of Aysén in Chilean Patagonia, is smothered by a thick, fragrant blanket of damp wood smoke that clings to the hillsides.

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Which is the world’s most vertical city?

You might think of Hong Kong, given its famous skyscraper skyline, but by different measures of verticality other cities come out on top

Looking out from sky100, Hong Kong’s highest observation deck on the 100th floor of the city’s tallest building, the 494-metre-high International Commerce Centre, you get a 360-degree view of one of the world’s most famous skylines – an urban jungle framed by mountains and the gleaming Victoria harbour, with endless clusters of high-rise buildings packed so closely together they resemble a game of Tetris.

It’s little wonder a city of such visible density has more skyscrapers than anywhere else in the world. According to the Council on Tall Buildings and Urban Habitat (CTBUH), Hong Kong has 355 buildings over 150m in height.

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The Innisfil experiment: the town that replaced public transit with Uber

Ridership is high and there’s plenty of work for drivers, but success has come at a cost to this Ontario town

Photographs by Cole Burston

When Daniel Arrega, 19, heads to work at a mall in Innisfil, he has few options for his commute. Walking along the highway would take nearly three hours. A taxi is faster but expensive.

So he takes the town’s public transit: Uber.

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