Michael Green

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ClimateWatch

In Greener Homes on September 19, 2011

Householders can help scientists research climate change

ONE spring afternoon, take a walk in your street and look around. Are there any purple flowers on the neighbour’s jacaranda tree? Can you see a welcome swallow – with its distinctive forked tail – perched high on the wires?

These observations might sound idle, but they could help scientists understand the way climate change is influencing our birds and bees.

“Climate change isn’t just about hotter weather,” says Richard Weatherill, from Earthwatch Institute. “But so far we don’t know much about how changes in temperature, rainfall and more extreme storm events are affecting the behaviour of our plants and animals.”

Together with and the Bureau of Meteorology and the University of Melbourne, the institute has developed ClimateWatch, a website that aims to fill in some of those gaps, with the help of the public.

Over 2500 people around the country have begun monitoring the behaviour of common species of birds, plants, insects, mammals, frogs, reptiles and spiders – both native and introduced – and recording their observations online.

The study of the timing of natural cycles is known as phenology. Because of the changing climate, it’s expected that spring and summer will come earlier. But what might that mean?

Last year, a study by the University of Melbourne showed that a one-degree increase in the city’s temperature had led to the common brown butterfly emerging from its cocoon ten days earlier than it did in the mid-twentieth century.

Mr Weatherill says that while such a change might sound innocuous, it could have far-reaching results – such as those demonstrated by a similar website in the UK, called Nature’s Calendar.

“Researchers found that butterflies were emerging and birds were nesting earlier, but there was a mismatch: where the young chicks would have fed on the caterpillars, they were no longer available,” he says. “That kind of impact starts to cascade in the ecosystem.”

Lynda Chambers, from the Bureau of Meteorology, says the breadth of the observations by householders in ClimateWatch will reveal some of the cascading effects in Australia for the first time.

“For example, for the pollination process we need to know what is happening both with the plant and with the insects that pollinate it. We’ll get an idea of how the ecosystem is changing, rather just a single species.”

She says the fact that the climate acts as a trigger for animal and plant behaviour has long been known. “Indigenous people knew the season was changing and food sources would become available, in large part, because they saw an indicator species – a particular plant would flower and that would be a sign that the fish would start appearing. It’s not something new, but we’ve become disconnected from how these things happen in the world,” she says.

Now, because of climate change, re-discovering knowledge about the timing of natural cycles has become especially important. But Dr Chambers says the benefits of all these observations won’t only accrue to the scientists.

“It’s easy to slip into the city mode of life where we go to the shops to buy our food and goods and we tend to forget that there’s a natural system lying behind it all providing these services,” she says.

“We forget plants and animals change their behaviour with the seasons. It can be fascinating to observe them.”

Read this article at The Age online

PARKing day

In Blog on September 17, 2011

BRAKING NEWS: Last Friday, several citizens commandeered a parking space on Little Lonsdale Street. The idlers topped up the meter all day, but used the asphalt for nothing more than lounging around, writing letters, hula-hooping and lively conversation. When questioned, they said it was PARKing day.

We arrived at seven o’clock in the morning, rolled out fake grass, positioned pot plants and a petite picket fence, then spread out an umbrella and deck chairs. PARKer extraordinaire Alicia brought most of the props, as well as fruit, sandwiches, hot drinks, cold drinks, baked goods and KeepCups. During the week, she’d contacted some local traders to let them know we’d be sitting around.

Passers-by were intrigued: some stared, some questioned us, some glanced and turned quickly away as though we’d made them accessories to the crime.

We said hello, invited people to join us and explained that along with hundreds of groups around the world, we had turned a car park into a park for pedestrians to enjoy. It was a fine place from which to ponder the use and misuse of public space in our cities.


My favourite visitor was a radiant nun, Anneliese, who had strayed off course in search of Collins Street. With a cup of tea in hand, she shared stories from her deeply reflective and, to us, wholly unfamiliar, existence. Anneliese, who wore a purple jacket and pearl earrings, had joined her order 54 years ago in Germany and subsequently dedicated over five decades to service in Australia.

Sculptor Benjamin Gilbert and philosopher Samuel Alexander also stayed a while. Karen, a sprightly woman who lived nearby, explained that a group of residents had been working on a plan to convert the neighbouring Wesley Church grounds into the only parkland within the Hoddle Grid.

We’d chosen the location for its slow, one-way traffic and proximity to a nice coffee shop. Fortuitously, an estate agent’s board directly across the road proclaimed the existence of a “UNIQUE INNER-CITY OASIS”.

Three employees of Melbourne City Council visited us throughout the day. Two of them, who worked in urban design and sustainability, cheered us on. The third fellow, who seemed to have something to do with permits and insurance and drove a large white car with orange lights on the roof, told us our behaviour was illegal and that we were “a danger to ourselves” and warned that other officers would come shortly to move us along.

No one came, however – aside from a parking inspector who declined to check our (up-to-date) meter, but instead, asked if he could take a photo.

Many people took snaps. We didn’t solicit media coverage, but we were photographed by The Age and the Melbourne Times Weekly, and also appeared on the Wheeler Centre’s blog. Architect-turned-photographer Nick Stephenson took plenty of pics too.

I had a wonderful day. It reminded me of one of my favourite memories from the two years I lived in Canberra. On a fresh spring day, my housemates and neighbours held a garage sale on our wide driveway. We gossiped with all-comers and ate home-cooked pizzas. It was the first time I appreciated the joy of neighbourliness.

PARKing day was similar. We had a quirky excuse to smile and say hello, and the perfect place to meet people we’d never otherwise come across. There is something to be said for sitting still. 


Changing chairs

In Blog on September 13, 2011

LAST week, following Greg Hatton’s advice about learning from old furniture, I spent a day with Michael Kelly. It has been over a year since we finished building the tiny studio, though I have visited his shop often in the meantime.

Michael decided we would refurbish old dining chairs, by replacing the seat with lath (thin timber strips used in old plaster interior walls), stripping them back and shaping them smooth.

The original chairs were rickety and ugly, with a flaky stain obscuring the timber. The Oregon lath, in contrast, has a rich and varied grain. Before long, it was clear that the chairs would become very attractive.

Throughout the last few weeks I’ve been shifting uncomfortably at my desk. As spring emerges from winter, I haven’t been able to write much. I have had little in my head besides the desire to work with my hands more often.

I sat in the shop and looked at all the things Michael had made from lath. There were bookshelves, coffee tables, tables, boxes, cabinets, shutters, and several small studio-sheds. So I said to him: “Lucky you came across lath – what would you be doing without it?”

He replied that wherever he went, he built with whatever material was in abundance. “In the city, forests of hundred-year-old timber are thrown away. There’s a constant supply that very few people make use of.”

He explained that when he lived in an old gold mining town in New South Wales, he had built with abandoned stone. He made stone walls and dry stone walls.

“And when I was living on a block with good clay soil,” he said, “I made mudbricks.” As a teenager, he built a mudbrick hut in the bush, spending only $30 on glass for windows.

Michael told me he took great confidence from the knowledge that wherever humans go, we have the capacity to use what is around us to gain the necessities of existence. Although life can seem complex and expensive, what is truly important is simple. Building, too, can be simple.

He showed me photos of timeless things he had built from timber, stone, brick and mudbrick – materials that humans have used for so long that we feel immediately comfortable in their midst.

And so we passed the day in this fashion, talking about life and building while we trimmed the wood and hammered dozens of small nails into the chairs, making them both firm and beautiful; unwanted objects that now will be treasured for decades.


Outdoor space in the city

In Architecture and building, The Age on September 12, 2011

The population is growing and gardens are shrinking, so where will the children play?

STICKYBEAK over the back fence of a typical new home – in an inner or outer suburb – and you’ll likely see this: a patio, paved and covered, with an in-built barbeque and outdoor heating. You’ll spot neat, ornamental shrubs and tidy stone gardens in narrow beds by the fence. And, if you peer down the side, you’ll spy a retractable washing line.

As our cities expand, a vast change is occurring; not only in the landscape, but also in the way we engage with outdoor space, both private and public.

Andrew Whitson, the Victorian general manager of Stockland, says that as a developer, he’s observed a clear trend towards smaller gardens in new homes.

“People still want some outdoor space and they want it to be functional and useful. But we’re all becoming time poor and we don’t want a large area to maintain. The days of dad spending the weekend out in the garden are changing,” he says.

“From what people are buying, we’re seeing that people love al fresco entertainment areas and I don’t see that changing.”

Mr Whitson says that although yards are much smaller, they’re more carefully designed. “We’re seeing fewer large trees planted and more manicured, low-maintenance areas, with paving, weather protection and heating, so they can be used year round.”

While he’s sanguine about the change, Griffith University academic Professor Tony Hall is worried about its implications. In a book published last year, called The Life and Death of the Australian Backyard, Prof Hall lamented the downsides for the community at large, including the loss of biodiversity and natural drainage, hotter cityscapes and the health impact of more indoor, passive pastimes, especially for children.

Using aerial photographs of developments around the country, he analysed the difference in backyards between older and newer subdivisions. He found that before the 1990s, suburban homes typically took up less than one-third of their lot. Newer houses, however, were much larger – covering up to two-thirds of the land.

In Victoria, the planning framework contains standards for private outdoor space in all kinds of dwellings. For detached homes and ground floor apartments, the minimum area is 40 square metres, depending on the block size. According to Prof Hall, until the last two decades, our suburban backyards were between four and ten times larger than that.

Like Mr Whitson, Prof Hall attributes “the disappearance of the backyard” to wider social changes. “Substantial sections of the population now work extended hours and have long commute times,” he writes. “Functionally, the house is seen as a place to wash and sleep… more as a financial investment than as a place to be enjoyed.”

To halt the shift to smaller backyards, he argues that planning codes should specify rear setbacks and maximum plot coverage of just over one-third.

Craig Czarny, from planning and design consultancy Hansen Partnership, agrees that the shifting balance between indoor and outdoor space has major repercussions for the way we live.

“It could mean that families spend more time inside, with children playing on their PlayStations and not spending as much time amongst nature. That has various implications for health and wellbeing,” he says.

“But you could also argue that the less space there is for private gardens, the more people will gravitate towards public spaces. I live in the inner city and I don’t have a large garden, so my children and I spend our time at the park.”

He draws on the Dutch concept of woonerf – a kind of street where pedestrians and cyclists have priority over cars. “It’s the idea that our streets are communal spaces. Yes, we share them with cars, but they are also parklands, pathways and play spaces,” he says. “As a denser city, we need to be more aware of living our lives more communally.”

Mr Czarny says the notion of the quarter acre block, so often described as intrinsic to Australian identity, actually only goes back two generations. Enabled by cheap oil and the rise of the motorcar, it too will change.

“Whilst many people will lament the loss of the private garden, the implication is that we should begin to use public space more effectively,” he says.

Recently, the Victorian Environmental Assessment Council completed the first ever survey of Melbourne’s publicly owned land. Its report revealed that the city’s public open space varies widely between municipalities: Glen Eira and Stonnington have the smallest proportion, while Nillumbik and Cardinia boast the most.

The report found that while our parks, squares and fields make a vital contribution to the city’s liveability, the amount of open space per capita will decrease over time as population grows. This will happen everywhere, but most significantly in established suburbs.

Mr Czarny says we can face the problem in two ways: by improving the quality of the outdoor areas we have, and also, by transforming utilitarian spaces, such as rooftops, decks and walkways.

“For example, we’re seeing gardens and tennis courts established on the roofs of commercial buildings, in areas formerly inhabited by air conditioning plants,” he says.

Children playing on the roof

IN the rooftop garden at The Harbour Family and Children’s Centre, at Docklands, a toddler in a yellow t-shirt is waist deep in a clump of greenery, tugging at the fronds.

The centre’s manager, Michelle Gujer, from Gowrie Victoria, approaches the boy. “Are you looking for Hoppy?” she asks. He nods, clearly chuffed to be in the thick of the garden, if somewhat perplexed as to the rabbit’s whereabouts.

“Young children learn through sensory play,” Ms Gujer explains. “So he’s really showing you exactly what this place is all about.

“The natural environment draws out their curiosity. It’s extremely important for children to be able to explore without the restriction of a confined space, especially for families who live in the inner city.”

At ground level, this part of Docklands is a dusty construction site, populated by cranes and beeping trucks. But on the roof, the air is rumbling with children’s chatter instead. Little people are marching to and fro, making mud pies, investigating the rocks along the dry creek bed and sitting beneath improbably large trees.

Matthew Mackay, from Hassell, was the project leader for roof garden, which was designed in collaboration with Children’s Landscapes Australia.

He says that although it can be complex to establish parks on roofs, he expects them to become more prominent as the city densifies.

“We need to have these kind of facilities close by, so we don’t lose touch with nature,” he says. “An important part of this project is to help children to understand natural processes and systems. We wanted to allow for as many play experiences as possible, with all kinds of materials and vegetation.”

Read this article at The Age online

Indoor plants

In Greener Homes on September 11, 2011

Greenery can revive the atmosphere at home

IF you live in a city or suburb, it’s likely the trucks and traffic sometimes make you gasp for breath. But Professor Margaret Burchett, from the school of environment at University of Technology, Sydney, warns that we can’t close our doors on poor air quality.

“According to the World Health Organisation, urban air pollution kills two to three million people around the globe every year,” she says. “But the amazing thing is that our air is more polluted indoors than outside.”

While Australian cities aren’t among the world’s smog-ridden worst, our population is overwhelmingly metropolitan. Eight out of ten of us live in urban areas, Professor Burchett says – and we spend nine out of every ten hours indoors.

In addition to the fossil fuel emissions that blow in from outside, indoor air typically comprises extra carbon dioxide, thanks to gas appliances and our breath, together with elevated levels of air toxics – volatile organic compounds (VOCs) from glues and synthetic materials.

“Inside our homes we have lots of petroleum-based products such as plastics, carpets, furnishings and electronics that are ‘off-gassing’ toxics,” Prof Burchett says.

These contaminants can cause health problems such as headaches, asthma, loss of concentration, wooziness and nausea.

But here’s the good news: we can freshen the air by bringing greenery into our buildings, places that Prof Burchett describes as “the most arid environment on Earth”.

Her team has been researching the way vegetation improves indoor air quality. They’ve found that pot plants can reduce the presence of VOCs by three quarters and diminish carbon dioxide levels by a quarter. “Plants help clean the air, there’s no doubt about that,” she says.

When it comes to vanishing the VOCs, it doesn’t matter what kind of indoor plant you choose – so long as you take good care of it. To reduce carbon dioxide levels, however, the more lush the foliage, the better.

“The bacteria in the potting mix are what takes up the toxics,” she explains. “The plant nourishes the bacteria, and the bacteria do the uptake. If you keep the plant healthy, it will keep its micro-organisms healthy and they’ll do the job – they’re the same bacteria that suck up oil spills, so this is just an entrée for them.”

In her living room, Prof Burchett has four pot plants (she had six, but two died recently while she was travelling – such calamities even befall the experts). Over- and under-watering are the most common ways to kill them, so she recommends testing soil moisture with your finger or a chopstick. To avoid mould growth, make sure you remove dead leaves and flowers.

“Have as many plants as you can, keeping in mind their level of shade tolerance,” she suggests. “Half a dozen will make a significant difference to your air quality and also to how you feel.”

Prof Burchett has been working with psychologists to study the wellbeing effects of plants in offices and schools.

“They lift the spirits,” she says. “They’re good for us psychologically. We’ve found that students perform better on memory and creative thinking tests. In offices, we found that one plant made all the difference in reducing in feelings of stress and hostility.

“When we’ve got greenery around us, it relieves our tension and fatigue.”

Read this article at The Age online

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