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NEWS: Coastal wetlands are unable to adapt to the rate of sea-level rise and are constrained by infrastructure

Wetlands, precious ecosystems that shield coastlines, safeguard drinking water from saltwater contamination, and nourish diverse wildlife, face a dire threat from the accelerating pace of sea-level rise, driven by global warming. Wetlands have historically adapted to rising sea levels by expanding upward and inland. However, predictions indicate that the waterline will soon shift far too rapidly for wetlands to keep pace. Consequently, future decades may witness the tragic loss of these vital wetland ecosystems. Wetlands along coastlines have historically played valuable roles for people and wildlife, but are now facing the threat of sea-level rise. As temperatures rise, sea levels are rising at an accelerating rate, and wetlands are unable to keep pace by building upward and migrating inland. This is due to human-induced climate change and the burning of fossil fuels, which has warmed the oceans and melted glaciers. Sea levels are now rising at about 10 millimeters per year, and are

Post Covid-19: Should we only stimulate construction that puts social housing first?

Professor Geoff Hanmer believes there is no better way of stimulating the Australian economy Post Covid-19 than by constructing social housing because it provides a long-term benefit to everyone. It adds stability to the lives of the occupants and it has a high local economic stimulatory impact.


Post Covid - 19 should South Africa focus its stimulus plans on construction that puts housing first given our social needs?



Why the focus of stimulus plans has to be construction that puts social housing first


Australia has done better with COVID-19 than anyone dared hope. This opens up the prospect of a progressive relaxation of restrictions later this year. Organisations that could participate in an economic stimulus program will need to be in a position then to deliver “shovel-ready” projects to help revive the economy.



The construction sector is the obvious focus of a stimulus plan, and the construction of social housing should be the priority, for reasons that I’ll outline below.

The Rudd government’s stimulus package during the Global Financial Crisis gives us a helpful guide to what does and doesn’t work. The initiatives that failed did so because of a lack of proper planning.
Why construction?


Most of the successful elements of the Rudd package focused on construction. The reason is simple. Nearly one in ten Australians work in the construction industry. Many more are employed locally in the production of building products.
Both construction and building product manufacturing provide jobs for people with varying levels of skill, including people who are unskilled. The vast majority of concrete and steel reinforcement, bricks, wall framing, building boards, windows and doors, roof tiles and metal cladding are still made here. A substantial portion of domestic electrical and plumbing products, including stainless steel sinks, copper pipes and electrical cables are also made here.



It’s important to realise that the type of building being constructed will affect its local stimulatory impact. For buildings up to three storeys high, over 50% of their cost is labour on site. Of the remaining cost, the vast majority is Australian-made materials and components. (Although the Australian Bureau of Statistics stopped its series on Australian-made construction products in 2014, the employment impact can still be estimated from ABS manufacturing statistics.)


However, the taller a building gets, the greater the percentage of imported components – lifts, mechanical components and facade systems are mostly imported.

Why social housing?

What sort of construction projects should the government consider for a stimulus package? While the response so far has been to focus on “fast-tracking” infrastructure, the current crisis has highlighted a number of pressing social needs. Various aspects of social housing top the list:

Housing to reduce the number of people living in precarious private rentals. A substantial program to increase the stock of social housing would be a great legacy.

Housing for people who are homeless. They will not be able to go on living in hotels once the lockdown ends.

Affordable housing for workers in health, emergency services, education and retail who cannot afford to live close to the communities they provide vital support to. It turns out they are essential workers, some of the most important people in Australia, so we need to look after them.

What other construction work is needed?

There are other opportunities for well-targeted construction stimulus.

In many areas of Australia, public schools and kindergartens still rely on low-quality portable buildings or buildings that have exceeded their economic life. A program to replace them with new and efficient buildings would produce substantial social benefits, cut maintenance costs and improve sustainability.

Improving the deteriorated state of community buildings and parks, particularly in disadvantaged areas, would also deliver social benefits and potentially employ a lot of unskilled labour. Having decent parks and exercise facilities close to where people live will allow social distancing to continue as long as needed.

A Victorian government plan to remove combustible cladding from residential and community buildings could also be extended to all states. It’s essential work that would also create jobs.

The government could also consider a program to replace or refurbish university teaching and research buildings that are over 40 years old. Incredibly, as we have found at ARINA in our consultancy work, these older buildings still provide more than half of the 11.8 million square metres of gross floor space occupied by the higher education sector.

These ageing buildings are not well suited to supporting the research into solutions to SARS-CoV-2 and other pressing medical and economic problems. Replacing or refurbishing them would improve outputs, cut maintenance costs and improve sustainability, plus give a much-needed boost to the higher education sector.

This opinion piece was first published on The Conversation

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