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Jun252015

Global South Urbanization Does Not Have to Harm Biodiversity

Thursday, June 25, 2015 at 9:34AM

How to balance fragile ecosystems with rapid urbanization will be the challenge for planners and governments across the global South in the coming years. The urbanization trend is clear: the world’s total urban area is expected to triple between 2000 and 2030, with urban populations set to double to around 4.9 billion in the same period (UNEP). This urban expansion will draw heavily on water and other natural resources and will consume prime agricultural land.

Global urbanization will have significant implications for biodiversity and ecosystems if current trends continue, with knock-on effects for human health and development, according to a new assessment by the United Nations Convention on Biological Diversity (CBD).

Cities and Biodiversity Outlook – the first global analysis of how projected patterns of urban land expansion will affect biodiversity and crucial ecosystems – argues that promoting low-carbon, resource-efficient urban development can counter urbanization’s adverse effects on biodiversity while improving quality of life.

“The way our cities are designed, the way people live in them and the policy decisions of local authorities, will define, to a large extent, future global sustainability,” said Braulio Dias, Executive Secretary of the CBD.

“The innovation lies not so much in developing new infrastructural technologies and approaches but to work with what we already have. The results often require fewer economic resources and are more sustainable,” he added.

The report says urban expansion is occurring fast in areas close to biodiversity ‘hotspots’ and coastal zones. And rapidly urbanizing regions, such as large and mid-size settlements in sub-Saharan Africa, India and China, often lack resources to implement sustainable urban planning.

But the study found that cities do not need to be in conflict with plant and animal species and ecosystems. They can, in fact, protect species, as is the case with Belgium, where 50 per cent of the country’s floral species are found in Brussels, or Poland, where 65 per cent of the country’s bird species occur in Warsaw.

At the Alexander von Humboldt Research Institute in Bogota, Colombia (humboldt.org.co) researchers have been thinking about how to get this balance right and make sure the growing cities of the future are not ecological disasters.

According to Juana Marino and Maria Angélica Mejia at the Institute’s Biological Resources Policy Program – which investigates “Biodiversity, Ecosystem Services and Urban-Regional Environments” – how cities grow and develop must change.

They believe cities need to take into account the resources they require to function and the impact this has on biodiversity and ecosystems.

“The more people who arrive in cities, the more they demand goods and services (in a massive way!): roads, housing, infrastructure, food, water – (creating) an impressive amount of waste, challenging traditional waste management and sanitation policies,” said Marino.

In short, “Cities enhance consumption.”

The Humboldt researchers believe common patterns can be seen across the global South, where ecosystems “surrounding urban areas are deforested and have significant levels of water and air pollution; they also become deeply transformed by informal settlements.”

This process means cities “lose their ability to be resilient, they become highly vulnerable to global change and they decrease their production of ecosystem services to maintain human well-being in cities.”

They argue that human settlements must be sustainably planned for, with ecological resilience and human well-being. If this is not done, areas suitable for agricultural production and biodiversity preservation will be harmed.

While better planning is needed there also needs to be long-term thinking.

But planning and managing are not the only things required: “it is a matter of design” if new “resilient” urban-rural landscapes are to be created.

And what can be done? They believe better analysis is required and it needs to take on social and cultural knowledge, and take in the border regions around cities, the “suburban, peri-urban and other ‘transition’ landscapes should become main actors in these relationships, not mere by-products; (they are) compromise territories between a lack of definition and low governance.”

These complex relationships with the border ecosystems of cities need to be communicated to the general public in simple, user-friendly ways so they can understand how important these areas are to the overall health of the city.

In Latin America, the cities of Curitiba (Brazil) and Bogotá and Medellin (Colombia) have made great strides in managing and planning for biodiversity and ecosystem services, they say. But it is not just as simple as recording the number of native species and the percentage of protected areas in urban places. Links need to be created between “social, scientific and political” elements to create “socio-ecological indicators” that can be developed and turned into “easy-to-adopt mechanisms” for people to use.

And they see innovation as the way to do this. Innovation is critical if cities and urban areas are to avoid widespread destruction of biodiversity as urbanization increases.

“Innovation is not just an option – it is a ‘must’,” said Marino. “Not just the technical innovation already being carried on by infrastructure, transport and building sectors that are rapidly changing their patterns based on mitigation technologies.

“Innovation is also needed in terms of biodiversity, biotechnology, information and knowledge production; appropriation, use and management. Knowledge turns into innovation when appropriated by social spheres; when it enters the social and political arenas.”

Environmental governance can be strengthened “when promoting top-down and bottom-up innovations.”

By David South, Development Challenges, South-South Solutions

Published: December 2012

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP's South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South's innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.

Follow @SouthSouth1

Google Books: https://books.google.co.uk/books?id=q1KeBgAAQBAJ&dq=development+challenges+december+2012&source=gbs_navlinks_s

Slideshare: http://www.slideshare.net/DavidSouth1/development-challengessouthsouthsolutionsdecember2012issue

Southern Innovator Issue 1: https://books.google.co.uk/books?id=Q1O54YSE2BgC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 2: https://books.google.co.uk/books?id=Ty0N969dcssC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 3: https://books.google.co.uk/books?id=AQNt4YmhZagC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 4: https://books.google.co.uk/books?id=9T_n2tA7l4EC&dq=southern+innovator&source=gbs_navlinks_s

Southern Innovator Issue 5: https://books.google.co.uk/books?id=6ILdAgAAQBAJ&dq=southern+innovator&source=gbs_navlinks_s

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Colombian Architect Proving Strength and Beauty of Bamboo

Tuesday, June 23, 2015 at 10:13AM

Fast-growing bamboo grass (http://en.wikipedia.org/wiki/Bamboo) has become a cause celebre amongst those looking for a sustainable and tough building material.

In the last five years, more and more construction projects have turned to bamboo. It has many advantages: it grows quickly, is super-strong yet also supple enough to bend in a hurricane or earthquake and has a high tensile strength (http://en.wikipedia.org/wiki/Ultimate_tensile_strength) equivalent to steel. It is, of course, green since it is grown in forests, and is cheap and plentiful in many countries of the South, especially across Asia and Latin America.

It is also aesthetically pleasing and makes beautiful structures with intricate patterns.

But despite all these advantages, it has been a hard sales job to get people to choose bamboo as a building material rather than traditional woods, steel or concrete. Many people wrongly think green means not strong. But as many a construction worker knows in Asia, where scaffolding made from bamboo is commonplace, it is tough and stands on its own.

Pioneers are working hard to prove bamboo deserves respect as a building material for a greener future.

Award-winning Colombian architect Simón Vélez has designed more than 200 bamboo buildings in Germany, France, the United States, Brazil, Mexico, China, Jamaica, Colombia, Panama, Ecuador, and India.

Vélez’s commissions are varied, and include a bridge for the Bob Marley Museum in Jamaica.

One of his recent projects is the Zócalo Nomadic Museum (http://en.wikipedia.org/wiki/Nomadic_Museum) in Mexico City. Another is the Crosswaters Ecolodge (http://www.asla.org/2010awards/370.html), the first ecotourism destination in China in the forests of Nankun Shan Mountain Reserve, Guangdong Province. For the Expo Hanover 2000, he designed and constructed a 2000-square-meter bamboo pavilion for ZERI (Zero Emissions
Research Initiative) (http://www.zeri.org/).

Vélez has developed pioneering joinery systems to connect bamboo poles together. This is a critical focus of innovation if bamboo structures are going to win people’s trust.

Based in Bogotá, Colombia, Vélez uses a well-trained crew to make his buildings and structures. This has the advantage of building expertise and a history of lessons learned from past successes and failures. That stability is a critical insight: many good ideas suffer from a lack of stability and longevity. He uses very simple, hand-drawn sketches on a single sheet of paper. He works with the peculiarities of the bamboo and does not treat it like wood: a common mistake.

To tackle the woeful lack of decent housing for the poor, he has developed a low-cost house that can be built by home-owners. It is highly resistant to earthquakes and is 60 square metres divided on two floors. It costs
around US $5,000 to make in Colombia.

Winner of the Prince Claus Fund (http://www.princeclausfund.org/en/index.html), Vélez’s work promotes sustainable development, introducing new ideas on ecological issues and questions. The Fund calls him an architect “whose aesthetic and technical innovations have considerably expanded the possibilities of bamboo as a building material, providing a challenge to prevailing architectural trends.”

With more than 1 billion people around the world lacking decent shelter, many see plentiful bamboo as a key part of the solution. Most people with poor quality housing live in urban areas, usually in slums and informal settlements (UN-HABITAT). Latin America has a serious shortage of adequate housing: in Colombia, 43 percent of the population needs decent housing; in Brazil, 45 percent; Peru, 53 percent.

The challenge is to provide good quality homes without significantly harming the environment – and with constrained budgets. Bamboo – cheap, strong, quickly renewable and beautiful – is an ideal solution to replace traditional wood lumber.

Bamboo is the fastest growing woody plant in the world, sometimes growing over 1 metre a day. Around the world, there are 1,000 species of bamboo. They grow in a wide variety of climates, from cold mountains to hot tropical regions.

Once called the “poor man’s timber” – a temporary building material to replace once there is more money – bamboo is now getting the respect it deserves. Bamboo for housing has a long history in Latin America, stretching back 4,500 years to ancient civilizations. In Asia, it has long been a traditional construction material. But most of the existing bamboo dwellings in Latin America are 50 to 100 years old.

The most popular species of bamboo used in South America is Guadua, which is known for being large, straight and attractive.

Thoughtful and methodical pioneers like Vélez are proving bamboo has a viable future as a building material that will tackle the housing needs of the world’s poor and the fast-growing cities of the South.