Australia's cities policies are seriously inadequate for tackling the climate crisis

Cities are prone to flash flooding. AAP Image/Dan Himbrechts

Cities are associated with most of humanity’s consumption of natural resources, such as coal and gas for energy use, and coal and iron to make steel. This means cities release enormous amounts of emissions.

Take the carbon footprint^[4] of Greater Melbourne, as an example. Melbourne released an estimated 100 million tonnes of carbon dioxide equivalent in 2009, or 25.1 tonnes per person. Of these, 4.5 tonnes are from construction and real estate services; the second highest contribution.

Materials such as steel, concrete, aluminium and glass are abundant in city infrastructure^[5], and their production releases significant emissions^[6].

The City of Melbourne has a stock of 1.5 million tonnes^[7] of materials per square kilometre. If we built the city today, construction alone would result in 605,000 tonnes of emissions per square kilometre. It would also use 10 petajoules of energy – the same as 700,000 cars driving from Melbourne to Sydney.

The construction industry requires better legislative drivers, including building codes, that encourage the use of recycled materials to reduce emissions.

Read more: 'A new climate politics': the 47th parliament must be a contest of ideas for a hotter, low-carbon Australia^[8]

Cities also bear a high cost of climate change impacts, particularly heatwaves and floods.

During heatwaves^[9], cities can be up to 12 degrees hotter^[10] than surrounding rural areas.

Cities are also prone to flash flooding^[11], as the high proportion of sealed surfaces such as concrete in urban areas can’t soak up water when it rains, like soil can. This makes them vulnerable to storm damage.

The construction industry releases significant emissions. Shutterstock

Barriers to climate action

Over the last five years, we’ve conducted^[12] in-depth interviews^[13] with 140 professionals working across built environment sectors.

They identified a number of key barriers to effective climate mitigation and adaptation in cities, such as a dearth of urban development policy addressing climate change^[14], particularly at the federal level.

They also identified a lack of government leadership, and financial constraints in the fiercely competitive property and development environment. An urban planner said:

We don’t even have a strategy for settlement in this country, let alone […] an urban development strategy. So, that’s where a lot of our climate change issues arise from: our cities and our urbanisation.

A federal urban policy agenda, if well designed and implemented, could help coordinate and fund urban development activities, providing leadership which industry would follow.

For example, it could determine where infrastructure (such as transport), services (such as hospitals), and housing are needed, and provide incentives for their sustainable construction.

ADF personnel removing flood-damaged belongings from streets in Lismore, New South Wales. AAP Image/Supplied by Australian Defence Force

Another barrier to effective climate action our interviewees identified was the tensions between local, state and federal governments, and the uncertainty about which level of government is responsible for taking action, including responding to disasters.

We saw this uncertainty most recently during the recent floods in New South Wales and Queensland, when there were delays in allocating emergency funds^[15] and assistance to people in need.

A property professional told us:

Climate change action needs to be driven by all governments, federal, state and local – it has to create a level playing field. The property industry and its developers will not try any [climate] action unless they think it will differentiate them and they would make money out of it.

What will happen to homes?

Decades of climate change knowledge are presently poorly translated into built environment policy. As the planet continues to warm, this will have dire consequences on Australia’s most populated areas, such as exacerbating inequities.

In some at-risk locations – such as towns built on floodplains or in bushfire-prone areas – local governments will have to manage increasing climate change impacts on declining budgets, as property values and revenue from council rates^[16] decline.

Read more: Lismore faced monster floods all but alone. We must get better at climate adaptation, and fast^[17]

Properties that can’t adapt to climate change, or for which the cost to adapt is prohibitive, will be unable to gain insurance. A recent analysis^[18] by the Climate Council found climate change impacts, particularly flooding, will make 1 in 25 Australian properties uninsurable by 2030.

This will reduce their value. Houses in areas prone to flooding or sea level rise have been found to be in a worse state of maintenance and repair^[19]. This compromises residents’ health and safety.

Many houses will become uninsurable in future. Shutterstock

The people worst hit by climate change impacts will be disadvantaged populations^[20] living in areas where property is cheap, and these groups will find it hardest to recover when disaster strikes^[21].

So what needs to change?

Thanks to our interviews, we can identify a few ways to help address climate change action in cities. This includes:

• federal regulation^[22] of the built environment to boost climate change mitigation and adaptation, such as by strengthening the construction code

• ambitious emissions reduction targets consistent with international goals, and translated into action across urban sectors

• greater resources, such as funding and professional development opportunities, to support action

Our interviewees also identified the need for stronger leadership, more policy certainty and more cohesive collaboration across all levels of government.

Read more: How do the major parties rate on climate policies? We asked 5 experts^[23]

What might this look like in practice?

Regulating land use with urban density and connectivity in mind would see homes, workplaces and services like hospitals easy to get to by walking, cycling or public transport. Likewise, improving building codes and design regulations would see buildings with less reliance on air conditioning or heating.

The incoming government should do everything possible to ensure we live a world that doesn’t exceed a temperature rise of 1.5℃ of warming this century. This cannot happen without stronger national policies on the built environment.

Read more https://theconversation.com/australias-cities-policies-are-seriously-inadequate-for-tackling-the-climate-crisis-182769

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