Madrid’s mayor is determined to clean up its air – by pedestrianising its biggest shopping street

The pilot scheme. Image: Sebastian Mann.

This month, a fairly innocuous A-road in south London breached a 2017 pollution limit just five days into the year. On the same day, Madrid’s left-wing mayor pledged to ban cars from a massive six-lane highway through the heart of the Spanish capital. If Manuela Carmena gets her way, Gran Vía, one of Madrid’s busiest roads but also a major shopping hub like Oxford Street, will be almost completely pedestrianised by 2019.

Her plans are part of a bold green vision that includes banning cars from the city centre, and even stretches to installing gardens on top of buses and bus shelters. They also represent the latest skirmish between the city and the private vehicle in the battle to make major metropolises somewhere it’s actually safe to live.

The proposals, which were tested out over the Christmas period, transform nearly half the road into pedestrianised zones, allowing shoppers to spill safely off narrow pavements while the rest of the street is left to public transport and the odd resident’s car. Importantly, other major roads in the area also face stringent traffic limits, making it devilishly difficult to dodge the restrictions with rat-runs through the centre. Officials are now analysing the temporary experiment ahead of implementing a permanent ban – but Carmena has confirmed she has every intention of carrying it out before her term ends in 2019.

Carmena, who leads the Ahora Madrid coalition backed by left-wing populists Podemos, appears to be moved by aesthetic as well as environmental concerns. Outlining her plans in a 4 January interview with Spanish radio station Cadena SER, she described the model for Gran Vía’s car ban – the street of the same name in Bilbao 0 as “deliciously pedestrianised”. Other city officials have also been quoted saying the broad aim is to make the place “well, just nicer”.

But the green case is uncontroversial and urgent. Campaigners estimate traffic fumes in Madrid kill as many as 2,000 people each year – something attributable to a toxic cocktail of over-reliance on the car and a natural atmospheric phenomenon that traps pollution in the city. Madrid has one car for every two of its 3.2m inhabitants, and its position on a plateau means that, in winter months, smog often grips the city literally in a choke-hold. Locals call it La Boina, or “The Beret”, because of the way the fumes sit like a hat above the city centre.

The scheme in action. Image: Sebastian Mann.

Environmental activist Simon Birkett, who runs the Clean Air in London campaign group, believes Madrid’s efforts demonstrate a “wonderful competition”, driving attempts from city mayors across Europe to out-do each other. The Spanish capital’s measures, he says, send a message to London to “get on with pedestrianising Oxford Street”.

However, he urges caution over implementation. “It’s similar in a way to the Oxford Street issue,” he says. “The risk is that you shut off that road and you get people driving around the side streets. What I would say is you have to combine this with the halving of traffic in the whole area.”

His warning is not wide of the mark. When Gran Vía’s temporary car ban was put in place over Christmas, it initially led to bottlenecks at key junctions while motorists came to terms with the restrictions.


But Madrid is also behind a greater assault on the private vehicle. On 29 December, half of all cars were banned from the centre on the (fairly arbitrary) basis of their number plates. It was an unprecedented response to spiking NO2 levels, and seemed like a radical statement of intent in the battle to make the city more liveable.

Other policies take a more softly, softly approach – such as the polite messages on the Metro that thank passengers for choosing public transport on particularly polluted days. What’s more, city transport bosses are trying to get their own house in order by completely replacing dirty, inefficient diesel buses with a 2,000-strong fleet of greener electric vehicles by 2025. In the meantime, officials want to plant gardens on top of buses and bus stops in an effort to soak up CO2 emissions, with shrubs being dug into turf aboard the vehicles at a cost of €2,500 a pop.

When Gran Vía was built at the beginning of the 20th century, it was considered an axe blow through the heart of Madrid. The bold project to effectively construct a Spanish Broadway – part arterial traffic link, part entertainment hub lined with theatres, restaurants and bars – led to disruption and meant the demolition of dozens of buildings.

Some one hundred years on, the theatres have been replaced by shops, and the street is again the focal point of an inevitably disruptive plan. But now, as then, the bold steps are necessary if Madrid wants to remain a modern and bustling yet liveable city. The current administration, it seems, is willing to drive the change. 

 
 
 
 

The IPPC report on the melting ice caps makes for terrifying reading

A Greeland iceberg, 2007. Image: Getty.

Earlier this year, the Intergovernmental Panel on Climate Change (IPCC) – the UN body responsible for communicating the science of climate breakdown – released its long-awaited Special Report on the Ocean and Cryosphere in a Changing Climate.

Based on almost 7,000 peer-reviewed research articles, the report is a cutting-edge crash course in how human-caused climate breakdown is changing our ice and oceans and what it means for humanity and the living planet. In a nutshell, the news isn’t good.

Cryosphere in decline

Most of us rarely come into contact with the cryosphere, but it is a critical part of our climate system. The term refers to the frozen parts of our planet – the great ice sheets of Greenland and Antarctica, the icebergs that break off and drift in the oceans, the glaciers on our high mountain ranges, our winter snow, the ice on lakes and the polar oceans, and the frozen ground in much of the Arctic landscape called permafrost.

The cryosphere is shrinking. Snow cover is reducing, glaciers and ice sheets are melting and permafrost is thawing. We’ve known this for most of my 25-year career, but the report highlights that melting is accelerating, with potentially disastrous consequences for humanity and marine and high mountain ecosystems.

At the moment, we’re on track to lose more than half of all the permafrost by the end of the century. Thousands of roads and buildings sit on this frozen soil – and their foundations are slowly transitioning to mud. Permafrost also stores almost twice the amount of carbon as is present in the atmosphere. While increased plant growth may be able to offset some of the release of carbon from newly thawed soils, much will be released to the atmosphere, significantly accelerating the pace of global heating.

Sea ice is declining rapidly, and an ice-free Arctic ocean will become a regular summer occurrence as things stand. Indigenous peoples who live in the Arctic are already having to change how they hunt and travel, and some coastal communities are already planning for relocation. Populations of seals, walruses, polar bears, whales and other mammals and sea birds who depend on the ice may crash if sea ice is regularly absent. And as water in its bright-white solid form is much more effective at reflecting heat from the sun, its rapid loss is also accelerating global heating.

Glaciers are also melting. If emissions continue on their current trajectory, smaller glaciers will shrink by more than 80 per cent by the end of the century. This retreat will place increasing strain on the hundreds of millions of people globally who rely on glaciers for water, agriculture, and power. Dangerous landslides, avalanches, rockfalls and floods will become increasingly normal in mountain areas.


Rising oceans, rising problems

All this melting ice means that sea levels are rising. While seas rose globally by around 15cm during the 20th century, they’re now rising more than twice as fast –- and this rate is accelerating.

Thanks to research from myself and others, we now better understand how Antarctica and Greenland’s ice sheets interact with the oceans. As a result, the latest report has upgraded its long-term estimates for how much sea level is expected to rise. Uncertainties still remain, but we’re headed for a rise of between 60 and 110cm by 2100.

Of course, sea level isn’t static. Intense rainfall and cyclones – themselves exacerbated by climate breakdown – can cause water to surge metres above the normal level. The IPCC’s report is very clear: these extreme storm surges we used to expect once per century will now be expected every year by mid-century. In addition to rapidly curbing emissions, we must invest millions to protect at-risk coastal and low-lying areas from flooding and loss of life.

Ocean ecosystems

Up to now, the ocean has taken up more than 90 per cent of the excess heat in the global climate system. Warming to date has already reduced the mixing between water layers and, as a consequence, has reduced the supply of oxygen and nutrients for marine life. By 2100 the ocean will take up five to seven times more heat than it has done in the past 50 years if we don’t change our emissions trajectory. Marine heatwaves are also projected to be more intense, last longer and occur 50 times more often. To top it off, the ocean is becoming more acidic as it continues to absorb a proportion of the carbon dioxide we emit.

Collectively, these pressures place marine life across the globe under unprecedented threat. Some species may move to new waters, but others less able to adapt will decline or even die out. This could cause major problems for communities that depend on local seafood. As it stands, coral reefs – beautiful ecosystems that support thousands of species – will be nearly totally wiped out by the end of the century.

Between the lines

While the document makes some striking statements, it is actually relatively conservative with its conclusions – perhaps because it had to be approved by the 195 nations that ratify the IPCC’s reports. Right now, I would expect that sea level rise and ice melt will occur faster than the report predicts. Ten years ago, I might have said the opposite. But the latest science is painting an increasingly grave picture for the future of our oceans and cryosphere – particularly if we carry on with “business as usual”.

The difference between 1.5°C and 2°C of heating is especially important for the icy poles, which warm much faster than the global average. At 1.5°C of warming, the probability of an ice-free September in the Arctic ocean is one in 100. But at 2°C, we’d expect to see this happening about one-third of the time. Rising sea levels, ocean warming and acidification, melting glaciers, and permafrost also will also happen faster – and with it, the risks to humanity and the living planet increase. It’s up to us and the leaders we choose to stem the rising tide of climate and ecological breakdown.

Mark Brandon, Professor of Polar Oceanography, The Open University.

This article is republished from The Conversation under a Creative Commons license. Read the original article.