The ECONOMIC Risks of Climate Change with Prof. John Quiggin
As the impacts of climate change intensify, understanding the economic risks becomes crucial for shaping effective policy. In the latest episode of Let’s Climunicate, Dr. Alberto Troccoli spoke with Professor John Quiggin of the University of Queensland, a renowned economist whose career spans agriculture, resources, and climate policy. Their discussion highlights how climate hazards translate into economic realities, and why the transition to a net-zero future may be more feasible, and affordable, than many assume.
Climate Hazards and Economic Risks
Quiggin began by framing climate change not just as an environmental issue but an economic one. Even at today’s warming levels of around 1.5°C, the costs are visible: species extinction, rising disaster losses, and sea-level threats. He emphasised that these risks escalate with higher warming levels, particularly for agriculture, health, and tropical regions. While tipping points remain uncertain, he argued that even low-probability catastrophic outcomes weigh heavily in economic risk assessments.
Translating Hazards into Costs
One challenge lies in quantifying these risks in monetary terms. Quiggin criticised widely used economic models for underestimating impacts such as biodiversity loss. Yet he stressed that the benefits of reducing emissions clearly outweigh the costs, since mitigation is achievable at relatively low economic expense. Rather than obsessing over exact numbers, he suggested, policymakers should act on the clear evidence that unchecked warming would cost far more than proactive measures.
Net Zero by 2050: Feasible and Affordable?
The conversation then turned to the feasibility of net zero by 2050. While some estimates put costs at 7-8% of global GDP, Quiggin argued these are overstated. For Australia, he suggested the transition could cost closer to 1–2% of GDP annually – and falling. Solar and battery technologies, already competitive with new gas, are rapidly undercutting fossil fuels. Electricity decarbonisation is technically achievable by 2050, with transport electrification close behind. The real barriers are political rather than economic.
Policy Pathways: Carbon Pricing and Market Forces
Quiggin highlighted the importance of carbon pricing, whether through taxes, tradable permits, or ad hoc measures that raise the cost of pollution. While economists favour elegant global solutions, real-world progress often comes from imperfect but workable policies. He cited the European Union’s emissions trading scheme as an effective example, while acknowledging Australia’s more fragmented approach. Ultimately, he argued, any policy that drives emissions downward should be supported, even if it falls short of theoretical ideals.
Individual Actions and the Road Ahead
While policy is essential, individuals also play a role. The widespread adoption of rooftop solar in Australia demonstrates public willingness to act. Choices like electric vehicles, home batteries, and energy efficiency measures further reduce emissions. Quiggin urged a pragmatic focus: it matters less which actions individuals take than that they collectively reduce greenhouse gases. Above all, he expressed cautious optimism that technology and economics will continue to drive progress – though he warned that delays only increase long-term risks.
Conclusion
The discussion with Professor John Quiggin underscores that climate change is not just a scientific or political issue – it is fundamentally an economic one. The costs of inaction are rising, but the tools for mitigation and adaptation are increasingly affordable. By combining pragmatic policies, technological innovation, and individual action, a sustainable transition remains within reach. This episode of Let’s Climunicate highlights the urgency of acting now – before the risks grow too costly to manage.
#LetsClimunicate #JohnQuiggin #ClimateEconomics #NetZero #RenewableEnergy #ClimatePolicy
