Guardian sustainable business – Page 2

The way we live now: the rise of the energy-producing home

March 20, 2015 admin

This article titled “The way we live now: the rise of the energy-producing home” was written by Elisabeth Braw, for theguardian.com on Monday 16th March 2015 13.49 UTC

Imagine living in a house that contributed to society: a house that produced energy, while consuming none itself. Well, imagine no more. After perfecting the “passivhaus”, which consumes minimal energy, engineers and architects have developed the energy positive house.

Generating energy is one thing, building a house is another. But with its plant-decorated walls and enormous double-glazed windows, the ArchiBlox Positive House, introduced in Melbourne’s City Square last month, looks elegant and modernist. “The trick is to make the sustainable and performance products visually pleasing while also practical,” reports David Martin, construction director of the ArchiBlox Positive House – the world’s first pre-fab energy positive house.

Rooftop solar panels and cooling tubes generate energy and regulate the temperature, while double-glazed windows and thick walls conserve energy. The end result: surplus power.

Energy producing house diagram — How an energy-producing home works. Photograph: Snøhetta

The ArchiBlox team is not alone in successfully completing the energy positive challenge. The German city of Königsbrunn, working in collaboration with the Augsburg University of Applied Sciences and a local gas and electricity company, is finalising the cube-like Visioneum in the central square, where city officials hope its presence will inspire residents to think about their household energy consumption.

At the University of California, Berkeley, students working in collaboration with Honda have developed yet another concept, the Honda Smart Home, which looks more like a typical terraced house, but which generates surplus energy the same way as the ArchiBlox and the Visioneum: by radically conserving it while generating more than it needs though solar panels.

Students at the Delft University of Technology, meanwhile, have invented a highly innovative “skin” that can be attached to existing houses with similar results. And in Norway, architecture firm Future Built has managed to turn two ordinary office buildings into energy-generating ones, cutting their energy use by 90% through additional insulation and the use of sensors to control light and heating. Here, too, solar panels on the roof provide energy that can be sold back to the grid.

With cars and homes accounting for 44% of greenhouse gasses in United States (and similar percentages in Europe), it’s no surprise that researchers and architects are trying to find ways of making homes more energy-efficient.

“The development of smart technologies, like the Google Nest, is making energy savings more convenient for users by allowing for control over temperatures in the house while you are away from the house, and allowing temperatures to follow your daily routines”, notes Esben Alslund-Lanthén, an analyst at the Danish sustainability thinktank Sustainia.

Kristian Edwards says building a plus-house is technically straightforward. “We calculated how many square meters of solar panels we needed and optimised the angle of the roof to get maximum solar yield,” he reports. “But plus-houses are also about minimising energy consumption, so we used as much recycled material as possible, such as whole bricks from a barn nearby.” With its box-like wooden top floor slanted over the lower floor for maximum sun exposure, Snøhetta’s experiment – the ZEB Multi-Comfort House, located in the Norwegian city of Larvik – boasts a visually striking appearance.

There’s just one thing: the cost. “Cost is always a factor when building houses that are taking advantage of the newest technology”, notes Alslund-Lanthén. “Plus-houses will likely remain more expensive than conventional houses, but on the other hand the owners will benefit from lower utility bills throughout the lifetime of the house, and in many cases from added benefits such as a better indoor climate due to improved ventilation, more daylight and better insulation.”

But Edwards, an architect at the Snøhetta architechture firm in Oslo, argues that plus-houses don’t have to be expensive, noting that a ZEB-style house may only cost 25% more to build than a similar, newly-designed home. The dropping cost of photovoltaic cells will also aid the advance of plus-houses.

Either way, utility companies are currently developing new payment models that will allow home owners to pay back the cost of the new technologies through energy savings. Other plus-house owners may opt to sell their surplus energy to the grid. At the ZEB house, in turn, surplus energy will power the electric car that future residents may own.

What’s life in a plus-house like? Norwegian families have volunteered to test the ZEB house for three months each and will report their findings to Edwards and his Snøhetta colleagues. And David Martin is about to find out for himself, having signed up to live in his ArchiBlox construction with his young family for the next 24 months.

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Alpine ski resorts gain boost from going green

February 16, 2015 admin

This article titled “Alpine ski resorts gain boost from going green” was written by Simon Birch, for theguardian.com on Monday 16th February 2015 07.15 UTC

Tourism manager Dominique Geissberger is looking out from her office in the small Swiss alpine ski resort of Villars at forests dusted with fresh snow and spectacular mountains dazzling in the winter sunshine. “This pristine landscape is what we all depend on,” says Geissberger. “It’s what tourists expect to find when they come here.”

In an effort to protect the environment upon which the village’s tourist trade relies, Villars has embarked on a comprehensive programme of sustainability initiatives ranging from introducing a fleet of hybrid buses that ferry skiers about, to low-energy snow-making systems.

In recognition of its pioneering environmental work, Villars has become the first ski resort in Switzerland and one of three resorts in the Alps to be awarded the Flocon Vert – the green snowflake – a sustainable certifying label run by Mountain Riders, a French group that campaigns for a more sustainable winter sports industry.

Exploring the use of labels as a way of encouraging and implementing sustainable development in mountain regions is a key goal for the Sustainable Mountain Tourism Alliance (SMTA), a global network of groups and organisations working for sustainability in alpine tourism that has recently been launched in Switzerland.

“Climate change is the number one environmental concern now facing mountain communities,” says Dr Tobias Luthe, professor of sustainability science from the SMTA, speaking at its launch conference which was attended by representatives from the mountain-based tourism industry.

“Last year was the warmest on record and already this winter many alpine ski resorts have had an unusual lack of snow, leading to major economic losses. We urgently need new sustainable business models and labelling systems have an important role to play in promoting sustainable development in these mountain communities,” says Luthe. “By quantifying different criteria such as energy use, transport and waste, labels can be used to communicate sustainability to a range of different markets and, crucially, encourage best practice in the sector.”

The economic case for ensuring sustainable development in the Alps is compelling: about 80 million tourists visit the Alps every year, generating close to €50bn Euros, providing an estimated 10% of all jobs in the region.

There are more than 50 different labels available for mountain-based resorts and hotels across Europe and they vary enormously in what they measure and the scale and scope of qualifying businesses. For example, with 42 different environmental and social criteria, the Flocon Vert is one of the most rigorous labelling schemes and applies to the whole operation of a ski resort, from its transport infrastructure to its use of renewable energy.

The Swiss-based Ibex Fairstay scheme meanwhile only certifies individual hotels and is a more entry-level scheme requiring relatively few environmental initiatives for businesses to qualify.

So what are the benefits of these labels? “The key benefit is that many labels require businesses to reduce their energy and water use which in turn can save them money,” says Herbert Hamele, who chairs Ecotrans, the European network for sustainable tourism development. “The other key benefit is that businesses which have been awarded a label also have a marketing edge over their competition.”

Anne Dorte Carlson, who manages the Sustainable Destination Norway label, agrees with Hamele: “We’ve surveyed tour operators and 62% say that they would more likely be interested in a destination if it carries a sustainable or environmental label,” says Carlson. “We believe that in the future this will give us a competitive advantage.”

The commercial benefits of an environmental label have been confirmed by Trip Advisor, a colossus in the global tourist industry which is now rolling out its Green Leaders programme in Europe, having launched the scheme in North America in 2013.

“The Green Leaders programme is designed to help travellers book a greener trip by recognising hotels and B&Bs that engage in environmentally friendly practices ranging from recycling to energy use,” says Trip Advisor’s Tom Breckwoldt, speaking at the SMTA’s launch conference. “Qualifying properties are then marked with a badge on their Trip Advisor home page.”

Significantly, Breckwoldt revealed that Trip Advisor’s own research has found that Green Leader businesses are 20% more likely to be booked compared with those that haven’t signed up to the free scheme.

With more than 300 million people using Trip Advisor every month, many believe that this new initiative has the potential to be a game-changer in the push for more sustainable development in mountain regions. “Small groups such as Mountain Riders are doing great work but they don’t reach the majority of people,” says Luthe.

“Trip Advisor is a very powerful way of reaching a massive audience and if they implemented a combination of tools recommended by the SMTA then this could be really exciting.”

Back in Villars, Geissberger is in no doubt about the importance of ensuring that the village heads in a more sustainable direction. “The environment is our future, it’s how we earn our living,” says Geissberger. “If we lose it, we’ll lose our tourism and then we’ll lose everything.”

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