Monthly Archives: October 2025

The 3-Degree Folly: the Australian Academy of Science Must Dump Its Support for Net Zero

Dr Bill Johnston

Instrument shelter (Stevenson screen) at Sydney Observatory December 2017. Site, instrument and screen size changes caused temperature to increase independently of the climate. (Photo credit Bill Johnston.)   

  • The Australian Academy of Science (AAS) has abandoned empirical scientific rigor in favour of advocacy, particularly in relation to climate change and net zero.
  • The risks to Australia of a 3°C warmer world (AAS-2021) is a politicised document recycled by activists within its ranks.
  • Historical climate variability is ignored in favour of a post-1950s “narrative” that data shows does not exist.
  • The policy and bureaucratic machinery surrounding climate legislation is highly centralised, economically destructive and not accountable to the electorate.

Net Zero is scientifically unjustified, economically irrational, democratically illegitimate and should be abandoned. The AAS should lead the way by dumping its support for net-zero.

Important links:

The rebuttal report is available here: (click here)

Commentary relating to the Report is available here: (Quadrant: the Australian academy of nonsense)

Royal Commission into National Natural Disaster Arrangements

Dr Bill Johnston

Crowdy Bay National Park January 2020 (Credit: Bill Johnston)

Summary and recommendations

  • Bushfire fighting capabilities are a matter for the States and the role of the Commonwealth should be limited to providing manpower (ADF personnel, who are largely untrained for firefighting per se.) and financial support on request. The problem with the Commonwealth assuming some overarching role is that it adds another level of complexity to an already over-crowded coordination-space; and as occurred during the recent crisis it also invites political grandstanding.
  • The proposal that the Commonwealth be able of its own volition to declare a state of national emergency is unsound. It could declare a ‘climate emergency’ for political purposes for example, when no such thing exists.
  • It ought to be of concern to the Commission that there is no evidence that Australia’s climate is changing or that summers are becoming longer, hotter or drier. Relationships between climate and bushfire are well understood and empirically predictable. Briefly, runs of years of above-average rainfall encourage fuel build-up, which if not controlled results in potentially cataclysmic fires once dry conditions return. As rainfall is episodic, unpredictable and shows no trend the contention that bushfire is related to some unnatural phenomenon is unsupportable and should not cloud the Commission’s deliberations.
  • It is a matter of great urgency to resolve the contradiction that, on the one-hand NSW Rural Fires Act (1997) compels managers of public and private land to undertake hazard reduction; while on the other, onerous environmental considerations make the carrying-out of hazard reduction more difficult and possibly illegal. As neither objective sits comfortably with the other, legislative change is recommended.
  • The intensity and unmanageability of recent fires in NSW resulted from the failure to mitigate biomass accumulation since the end of the Millennium drought in 2010/11. Blame for that situation lies squarely with the environmental provisions of the Rural Fires Act (1997), which places undue restraint on Rural Fire Service volunteers and others by requiring them to take account of ‘principles of sustainable development’ in order to gain approval for implementing control measures on public land.

Important link:

Click here for the detailed report (Click here)

The 3-Degree Folly: the Australian Academy of Science Must Dump Its Support for Net Zero

Dr Bill Johnston[i]

scientist@bomwatch.com.au


[i] Former NSW Department of Natural Resources research scientist and weather observer.

Main points

  • The Australian Academy of Science (AAS) has abandoned empirical science in favour of advocacy, particularly in relation to climate change and net zero.
  • The risks to Australia of a 3°C warmer world (AAS-2021) is a politicised document recycled from activists within its ranks.
  • The policy and bureaucratic machinery surrounding climate and nature-positive legislation is highly centralised, unaccountable, and economically destructive.
  • Historical climate variability is ignored in favour of a post-1950s “warming narrative”.

Net Zero is scientifically unjustified, economically irrational, democratically illegitimate and should be abandoned.

  1. Background

Entrusted under its Charter to promote and uphold rigorous scientific standards, the Australian Academy of Science seems to have forgotten what science is.

Drawn under the umbrella of CSIRO and universities by the Commonwealth and the Council of Australian Governments, the quality of Australia’s natural resources research effort has deteriorated markedly over recent decades. Decline is evidenced by an overreliance on complex models – often described simply as “The Science” – which lack robust empirical grounding. Instead of fostering unbiased inquiry based on rigorous research, the scientific process has been swayed by policy objectives, leading to questionable conclusions about the effect of climate change and warming in Australia.

  • The AAS-2021 report

In March 2021 the AAS released a report written by an independent “expert panel” chaired by WWF supporter, activist and Great Barrier Reef doomsayer Professor Ove Hoegh-Guldberg (hereinafter AAS-2021). The report entitled “The risks to Australia of a 3°C warmer world” was reviewed by “expert reviewers” headed by Professor Ian Chubb, former Chief Scientist. Chubb was connected to Hoegh-Guldberg due to his Chairing the GBR Independent Expert Panel of the Reef 2050 Advisory Committee, of which Hoegh-Guldberg was a prominent member. 

AAS-2021 claimed “Heatwaves, bushfires, storms and coastal flooding, have become more frequent and intense in recent times”. Also, that “risks are likely to escalate as global temperatures continue to rise” and that: “our capacity to respond becomes compromised as frequency increases”. Further, that the only way to contain the risks of global extinction was for Australia to reduce its already miniscule emissions of carbon dioxide (CO2) to net zero by 2050.

  • Review of AAS-2021 – motivation and impetus

Scientific progress fundamentally depends on the impartial testing of hypotheses supported by solid empirical evidence. In contrast, consensus indicates progress has stalled, possibly because inconvenient data, or alternative viewpoints are ignored or loudly brushed aside. For example, while low rainfall across eastern Australia from about 1996 to 2010 was stridently blamed on global warming, conditions were considerably worse, and the economic consequences more dire, during droughts that ended with the WW-II drought in 1947[i]. Focussing on post-1950s ‘warming’, reimagines the true history of Australia’s climate.

  • Policy becomes science

Established in 1998, the Australian Greenhouse Office (AGO) was the world’s first agency dedicated to reducing greenhouse gas emissions. The AGO was also tasked with providing government-sanctioned information to the public. Former speechwriter for Senator Robert Hill, Environment Minister from March 1996 to November 2001, Guy Pearse, was also a paid AGO consultant. According to his Biography[ii] Pearse was also a lobbyist and worked for a time for then U.S. Vice President, climate-doomist Al Gore.

For his ANU thesis[iii] that essentially decried the influence of the National Farmers Federation and alleged fossil-fuel lobby groups on Howard-era greenhouse policy, Pearse neglected to mention or reach-out to the green-lobby, specifically WWF-strategist Mr Peter Cosier. While their paths seemingly never crossed, the former environmental planner for the Yass Shire Council, became senior policy adviser to Robert Hill at the same time Pearse was Hill’s speechwriter. The Environment Protection and Biodiversity Conservation Act (1999) was likely strongly influenced or written by Cosier, WWF and its former President Robert Purves.

Interestingly, while Pearse invents conspiracy theories, writes one-sided opinion pieces and books admonishing industries that paved his way from childhood to speechwriter[iv], Cosier moved on. Having demolished state-based Murray-Darling Basin natural resources research agencies; and via the office of Minister for the Environment, eventually re-purposing the Bureau of Meteorology and CSIRO to reflect the policy demands of ‘green-science’, Cosier is now a board member of Accounting for Nature Ltd. — an outfit that through his convening the Wentworth Group of Concerned Scientists on behalf of Purves Environmental Fund, Cosier was instrumental in creating.

Accounting for Nature Ltd. is just one of the pillars of the Commonwealth’s Nature Positive Plan – a plan that will eventually plan Australian industries out of existence by creating another tax burden alongside the re-vamped carbon tax. Documents point to a bureaucratic nightmare[v], plans within plans, climate goals set by the ‘independent’ Climate Change Authority, regulations enforced by an ‘independent’ Environment Protection Authority, and an ‘independent’ Clean Energy Regulator – all unelected, hand-picked and unable to be sacked – an unnecessarily complex and costly imposition on farmers, businesses and taxpayers, but not accountable to the increasingly sidelined electorate. Government by process-creep and fiat[vi] unconscionably undermines Australia’s system of parliamentary democracy.

  • The information marketplace tsunami

Since the 1990s funds provided by research councils and government were steered to support policy rather than explore ir advance contentions or contradictory issues. Concentrated in fewer and fewer hands, together with funding constraints, science’s capacity to provide fearless, balanced advice was severely compromised.

Taken together – funding and policy directives including AGO’s remit to only provide government-sanctioned information into the public square, led to a virtual tsunami of publications, new journals, PhD theses and studies in support of the warming narrative. In addition, many investigations and technical reports were funded directly by the AGO to support the governments carbon-accounting model — FullCAM.

Google Scholar estimated 25,100 papers related to “climate change Australia” were published between 1980 and 1990. The following three decades saw exponential growth: 142,000 (1991–2000), 231,000 (2001–2010), 541,000 (2011–2020), and 228,000 from 2021 to October 2025. Sea-level rise alone attracted some 15,000 references between 1990 and 2022[vii]. According to Gemini AI, press activity rose from 514 articles per year in the 1990s to over 80,000 per year in the 2010s.

Climate projections, initially simple brochures, have evolved into multi-volume, multi-tool digital products — all dependent on government funding[viii]. The sheer volume of agenda-messaging, risks overwhelming public understanding rather than clarifying uncertainties.

The Australian Academy of Science is trapped within this web: it accepts government largess, which binds it to unquestioningly support policy. COVID overreach[ix] is a poignant example of an instance where public debate was stifled.

  • Climate warming: a wicked scientific problem

The supposed threat of global warming is wicked in the sense that it is complex, challenging and open-ended. If it exists, its causes and effects are interconnected and there is no way to know if or when the problem is solved. Evidence of climate warming is also impossible to separate from the chaotic behaviour of the natural world. Regardless of the precautionary principle outlined in AAS-2021, which itself lacks scientific boundaries, it is foolish to deplete treasure on a problem defined by moving goalposts and which is non-solvable in a conventional sense.

Overarching narratives of the United Nations and particularly the World Economic Forum of using COVID and disaster-marketing more broadly to achieve a “Great Reset” – essentially a coordinated policy shift without electoral mandate, should ring alarm bells throughout western democracies. WWF’s nature positive laws fall within that gambit.

Against the background of policy-driven science, moving goalposts, unachievable outcomes, and the desire by elites including the WEF and WWF to exert coercive control over sovereign states and the freedom of individual citizens, it is important that claims of imminent climatic, ecological or sociological catastrophe, highlighted in AAS-2021 be closely examined and adjudicated based on hard evidence, and from a scientific rather than an emotive perspective.

  •  Conclusions and a bridge to the 2022 critique

In the interest of open debate about the climate and its many confected horrors, it is an opportune time to put the evidence into the public domain. The unedited 2022 critique of AAS-2021, submitted to the Australian Academy of Science may be accessed here.

  • The Academy ignored it, but the issues remain — and they deserve public scrutiny.
    • Australia has always been the driest inhabited continent. Our landscapes are old, eroded and infertile and our fire-adapted vegetation has evolved to contend with highly seasonal and episodically changeable climates
    • Historical records show natural disasters long predate contemporary climate change concerns; there is no evidence that frequency, extent, or intensity has or will change markedly in the future.
    • Due to its reliance on cherry-picked, modelled, or homogenised data, AAS-2021 fails to present multiple lines of evidence that extreme events are increasing. No credible evidence exists that temperatures, evaporation, or rainfall are trending in ways that materially increase bushfire risk or imperil the Great Barrier Reef.
    • The unfounded claim that action by governments will change or control the climate is irrational and absurd. Even if it were remotely likely, the prohibitive cost, and the consequences for employment, industry, commerce and sovereignty is not in Australia’s national interest.

In short, AAS-2021 is unbalanced, unscientific, and strongly biased. It lacks evidence of a catastrophic future, yet it interferes with politics by promoting narratives that are never likely to come to pass.

Dr Johnston’s detailed repudiation of AAS-2021, which the Academy ignored is available here [click link]


[i] Foley, J.C., 1957. Droughts in Australia. Review of records from earliest years of settlement to 1955. Bulletin No. 43, Bureau of Meteorology, Melbourne, September 1957.

[ii] https://en.wikipedia.org/wiki/Guy_Pearse

[iii] https://openresearch-repository.anu.edu.au/bitstreams/7f600956-ffb2-4106-9316-a7808c926568/download  

[iv] Pearse, Guy (2007). High & Dry: John Howard, Climate Change and the Selling of Australia’s Future. Penguin (Australia).ISBN 978-0-670-07063-3.

[v] https://www.dcceew.gov.au/sites/default/files/documents/nature-positive-plan.pdf

[vi] Funnell, W., 2001. Government by fiat: the retreat from responsibility. Unsw Press.

[vii] Communications Earth & Environment (2023) 4:257 https://doi.org/10.1038/s43247-023-00920-4     www.nature.com/commsenv

[viii] Whetton, P.H., Grose, M.R., and Hennessy, K.J., 2016. A short history of the future: Australian climate projections 1987–2015. Climate Services, 2-3, 1-14. http://dx.doi.org/10.1016/j.cliser.2016.06.001

[ix] https://www.paulramsayfoundation.org.au/news-resources/fault-lines-an-independent-review-into-australias-response-to-covid-19

Part 7d. Mount Isa, Queensland, Australia

Dr Bill Johnston

www.bomwatch.com.au

Mount Isa post office (Bureau of Meteorology, BoM ID 29125), and Mount Isa airport (Aero, 29127; Latitude -20.72o, Longitude 139.49) joined 1 January 1967; temperature data from 1 January 1957 to 31 December 2024; and separately, Mount Isa Mine (29126), Latitude – 0.7361, Longitude 139.4817; temperature from January 1965 to July 1992.

Although mining is due to cease in the near future, Mount Isa in central Queensland is home to one of the most productive single mines in the world. A post office opened in 1924, and the railway to the port of Townsville opened in 1929. An aerodrome constructed for the United States Army Air Force in 1943 became a major military camp during WWII. Post office data from 1957 were merged with Aero site data from January 1967.

While little seems known about conditions in the post office yard, site summary metadata suggests the Aero site was partially automated in September 1996, but a humidity probe was apparently not installed until March 2009. An Almos automatic weather station (AWS) has replaced manual observations but the changeover date is not available. Metadata also ignores when 60-litre Stevenson screens replaced 230-lite screens at the previous or current site; however, it is likely to have been before data for the earlier manual comparison site was so-designated. As metadata cannot be trusted, analysis is best undertaken using objective statistical methods.

While not an Australian Climate Observations Reference Network – Surface Air Temperature (ACORN-SAT) dataset used to monitor Australia’s warming, together with up to nine other sites including some ACORN-SAT ones, maximum temperature (Tmax) observed at the post office, airport and the mine were used by scientists at the BoM to homogenise ACORN-SAT sites as far afield as Victoria River Downs (1015 km), Rabbit Flat (987 km) and Longreach (571 km) (Figure 1).

Figure 1. In addition to Victoria River Downs, Rabbit Flat and Longreach, maximum temperature data for Mount Isa post office, Aero and the mine were used to homogenise ACORN-SAT sites at Tennant Creek, Camooweal, Burketown, Normanton and Richmond.   

As no attempt is made by ACORN-SAT to assess the quality of data used to construct comparator datasets, as a subset of Victoria River Downs, this study aimed to determine whether the combined Tmax dataset for the post office, airport (Aero), and the mine were fit for the purpose of homogenising other sites.

Conclusions

While Tmax data for the airport and mine were thermodynamically sound, due step-changes in their rainfall-adjusted mean, neither dataset was homogeneous. Lack of reliable metadata and corroborating information such as aerial photographs, satellite images and archived plans and documents, is a major problem in relating step-changes in data to changes at sites.

Possible site changes include undocumented site moves, removal of vegetation in the vicinity of screens using herbicide or mechanically, replacement of 230-litre Stevenson screens with 60-litre ones, introduction of the Almos AWS at the airport and the withdrawal of staff that maintained sites and instruments.

Checks and balances that are part of the BomWatch approach provide assurance that step-changes in 1966, 1980, 1996 and 2013 in the combined post office/Aero dataset, and in 1980 at the mine, are unrelated to the climate. Post hoc tests verified that data consist of non-trending segments delineated by step-changes that are unrelated to the weather.

Importantly, accounting for step-changes and rainfall simultaneously left no residual trend or change that could be attributed to CO2, coal mining, electricity generation or anything else.

The use of correlated, faulty data that are not homogeneous, to adjust faults in ACORN-SAT has no statistical or scientific merit and should be abandoned.

Important Links:

Click here to download the full paper with photos, graphs and data

Click Here to Download the Mount Isa DataPack