151395 - Implications of Australia's population policy.pdf (1.46 MB)
Implications of Australia's population policy for future greenhouse gas emissions targets
journal contributionposted on 2023-05-21, 10:00 authored by Bradshaw, CJA, Barry BrookBarry Brook
Australia's high per capita emissions rates makes it is a major emitter of anthropogenic greenhouse gases, but its low intrinsic growth rate means that future increases in population size will be dictated by net overseas immigration. We constructed matrix models and projected the population to 2100 under six different immigration scenarios. A constant 1 per cent proportional immigration scenario would result in 53 million people by 2100, producing 30.7 Gt CO2-e over that interval. Zero net immigration would achieve approximate population stability by mid-century and produce 24.1 Gt CO2-e. Achieving a 27 per cent reduction in annual emissions by 2030 would require a 1.5- to 2.0-fold reduction in per-capita emissions; an 80 per cent reduction by 2050 would require a 5.8- to 10.2-fold reduction. Australia's capacity to limit its future emissions will therefore depend primarily on a massive technological transformation of its energy sector, but business-as-usual immigration rates will make achieving meaningful mid-century targets more difficult.
Publication titleAsia and the Pacific Policy Studies
Department/SchoolSchool of Natural Sciences
PublisherJohn Wiley & Sons
Place of publicationAustralia
Rights statement© 2016 The Authors. Asia and the Pacific Policy Studies published by Crawford School of Public Policy at The Australian National University and Wiley Publishing Asia Pty Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) License, (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.