Australia Feels Heat on Climate Challenge

Karl Wilson

Australia faces a challenging future and confronts the possibility of the catastrophic bushfires that ravaged many parts of the continent last summer and the devastating floods this March along the eastern seaboard becoming the norm.

These are not just wild estimates but the collected opinions of some of the country's leading scientists in a report issued by the Australian Academy of Science on March 30.

In the report， titled “The Risks to Australia of a 3°C Warmer World”， scientists said Australia， as the driest inhabited continent， is “highly vulnerable to the impacts of global warming”.

“Multiple lines of evidence show that the incidence of extreme weather events will increase as the planet warms，” it said.

Such events are a natural feature of the climate system， but there is strong evidence that many of them， such as heatwaves， bushfires， storms and coastal flooding， have become more frequent and intense in recent times.

The argument that Australia doesn't contribute “significantly” to the greenhouse gas emission problem and therefore should not act on climate change ignores the enormous losses that Australia will experience if it doesn't work with the rest of the world to achieve and exceed the Paris Agreement goals.

Over the past five years about half of hard coral cover in the shallow waters of the Great Barrier Reef， the world's biggest coral reef complex， off Australia's northeastern coast， has been lost due to global warming.

Scientists  have  estimated  that  an  80-centimeter rise in global sea levels would drown most of Australia's low-lying coastal areas， with crop yields falling between 5 percent and 50 percent. Sydney and Melbourne can expect extreme heatwaves， with temperatures reaching 50°C.

Ove   Hoegh-Guldberg   of  Queensland University and Lesley Hughes of Macquarie University in New South Wales， two professors who co-authored the report， said “this is not an imaginary future dystopia”.

“It's a scientific projection based on our current emissions trajectory—a vision of Australia we must both strenuously try to avoid， but also prepare for，” they said， according to a report on the news website The Conversation.

“For Australia， which is such a large per capita contributor to global emissions， and which has such abundance of natural renewable resources， the answer lies in scaling up clean energy generation ASAP，” Brian Schmidt， vice-chancellor   of   the  Australian  National University， said during the 2021 United Nations Climate Adaptation Summit recently. “This is an urgent moral obligation which Australia must not shirk.”

Zero emissions target

Several countries are working towards net zero emissions by 2050， but in Australia's case it is still a political issue with no commitment forthcoming.

Quiggin noted that the European Union is moving steadily towards the imposition of a border tax on exports from noncompliant countries.

Ian Lowe， emeritus professor of science， technology and society at Griffith University in Queensland， said： “The world must reach zero emissions before 2050 to avoid dangerous climate change. To do our share， we need to develop action plans for the major sectors of electricity， transport， manufacturing and agriculture.”

Dries Verstraete， associate professor in the University of Sydney's faculty of engineering and a specialist in fuel cells， said： “It's not just electric and hybrid cars that need investment and   stewardship，   but   aviation   too.   De-carbonizing commuter aircraft will contribute to reducing worldwide greenhouse gases.”

However， the need to switch to electric-powered road transport is what is really more important， Verstraete said， pointing out that road transport accounts for a much larger proportion of man-made emissions than aviation. “Many people think aircraft are the biggest polluters and are a luxury but forget that taking their car to work every day contributes a lot more.”

（北京 王 娜 供稿）