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Experts worldwide, including the , consider climate change to be the greatest global health threat of the 21st century. The effects of climate change are already being felt 鈥� both directly due to injury and illness from extreme weather events and indirectly from worsening air and water pollution, changing food security and changing patterns of infectious diseases. The social effects of climate change are also evident through resulting mass displacement (climate refugees), economic hardship, and mental health and stress-related disorders.

One climate change event that is still heavy in the minds and hearts of Australians is the unprecedented 2019鈥�2020 bushfires 鈥� the fires that 鈥榮topped a nation鈥�.

The 鈥楤lack Summer鈥� fires that raged across the east of the country between October 2019 and March 2020 are thought to have resulted in around 450 deaths from either fire exposure or bushfire smoke inhalation, with the December 2019 airborne particulate matter (PM2.5) concentrations in NSW and the ACT being the highest of any month in any state or territory. There were also 3151 hospitalisations from cardiovascular or respiratory problems and 1305 presentations to emergency with asthma-related illness. The widespread mental health and social impacts (to both those directly affected, as well as those more distant who bore witness to the event) are likely to continue for years to come, similar to prior fire events, such as Victoria鈥檚 Black Saturday bushfires in 2009. In addition to this health burden the total economic toll of the summer fires through direct, indirect and intangible losses has been profound, with the estimated costs likely to reach a total of $100 billion.

Last summer鈥檚 catastrophic bushfires exposed Australia鈥檚 vulnerability to extreme weather, and were a chilling indication of what may come as a result of further climate change. As outlined in the recent , our changing climate is exposing Australians to climate-related illnesses, and healthcare services are vulnerable to a range of risks, including an increase in patient demand and threats to infrastructure, workforce and supply chains. Paradoxically, the healthcare sector is a significant contributor to climate change 鈥� its carbon footprint is estimated to be 7% of Australia鈥檚 total carbon emissions.

In response, (DEA) have recently released a new report Net Zero Carbon Emissions that calls for the health sector to adopt:

• an interim emissions-reduction target of 80% by 2030;
• net zero emissions by 2040.
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The report proposes that these sector-wide emissions reductions should be coordinated by an Australian sustainable healthcare unit (SHU), similar to the one in the UK. Improving healthcare鈥檚 carbon footprint will also bring economic benefits to the sector鈥檚 budget. In areas of waste, water and energy, the UK鈥檚 Sustainable Development Unit saved more than 90 million pounds in 2017 compared with 2013/2014.

The recent stated, 鈥淣o continent, country or community is immune from the health impacts of climate change鈥� [however] aligning the global COVID-19 recovery with our response to climate change offers the chance to protect health, promote a sustainable economy, and preserve our planet鈥�.

Health care, with the guiding principle of first do no harm, has an ethical responsibility to get its own house in order and to lead by example 鈥� to secure the health and wellbeing of people now and into the future.

Emma-Leigh Synnott is a Consultant Physician in Rehabilitation Medicine at the Fiona Stanley 黑料吃瓜群网 in Perth and the Medical Lead for Climate Health and Environmental Sustainability in the FSFHG hospital network. The WA Chair for Doctors for the Environment Australia, Emma-Leigh is also on the working party for a WA Climate and Health Community of Practice.

Carrie Lee is a junior doctor with an interest in global/public health and advocacy. She is a member of Doctors for the Environment Australia and is studying a masters of public health and tropical medicine.

Image credit: 漏stock.adobe.com/au/steph photographies