What is "Net Zero" anyway?

Last month, the leaders of the G7 declared their commitment to achieving net zero emissions by 2050 at the latest. Closer to home, the Albanese government recently introduced legislation to establish a Net Zero Economy Authority, promising it will catalyse investment in clean energy technologies in the push to reach net zero. Pledges to achieve net zero emissions over the coming decades have proliferated since the United Nation’s 2021 Glasgow climate summit, as governments declare their commitments to meeting the Paris Agreement goal of holding global warming under 1.5°C. But what exactly is “net zero”, and where did this concept come from?

In May 2024 I wrote a short explainer for The Conversation, and spoke with Dr Meredith Lake on ABC Alice Springs in the lead up to the 2024 Northern Territory election.