It was over 2 decades ago that pioneering Australian nephrologist John Agar, MBBS, first alerted the kidney care community to the extraordinarily high resource consumption profile of hemodialysis. He documented that each 4-hour treatment used in excess of 500 L of water, with two-thirds discarded to drain as reverse osmosis (RO) reject water (1). Per-treatment power usage was similarly high (more than one-quarter of the total daily power consumed by an average Australian home), and hemodialysis’ annual per-patient carbon footprint was more than one-half of the mean Australian per capita estimate (2).
His group then implemented a range of strategies to minimize their service's resource impact. These included capturing RO reject water for reuse elsewhere—for the first time globally—and installing solar panels to power dialysis equipment (1, 3). Agar called loudly for others to follow his lead. But he was a lone voice, and at the time, few, aside from some in the United Kingdom, heard his rallying call.
Broader action
It took over 10 years for the broader Australian kidney care community to spur to action. In 2017, with a new generation of nephrologists pressuring leadership, mentored by Agar, the Australian and New Zealand Society of Nephrology (ANZSN) established an Environmental Sustainability Committee (ESC). The group's aim was to foster, promote, and support environmentally sustainable kidney care in Australia and New Zealand. The range of initiatives it has undertaken over the years since is outlined in Table 1.
Environmental Sustainability Committee initiatives
Collectively, this work has led to significant increases in awareness of both the need for and ways to achieve “green kidney care.” Yet, despite these efforts, a 2020 survey of Australian and New Zealand dialysis services found that environmental sustainability remained a low priority in clinical practice, building design and infrastructure, and management systems (6).
Accordingly, the ESC has since turned its attention to initiatives aimed at stimulating “on-ground” change. In 2022, it published best practice guidelines for the design, construction, and operation of dialysis facilities (7). These outline objectives and minimum requirements across the areas of energy, water, waste, and resource recovery (Figure 1). They have been incorporated into the Australasian Health Facility Guidelines for Dialysis Units, which should aid broad implementation. The ESC has also developed guides for optimizing RO plant settings, hemodialysis machine disinfection schedules, and acid concentrate use. Work is now underway to identify “green champions” in each kidney care service to apply the guidance.
Examples of objectives for opportunity areas identified in dialysis units
Citation: Kidney News 16, 4
Where to go from here?
The global situation is markedly different today compared with Agar's day. Rather than being a future threat, climate change is currently exerting an escalating toll on nature and people. Simultaneously, there is now widespread acceptance of the need for deep, rapid, and sustained action, including from within the kidney care community.
Green kidney care committees and initiatives now exist in multiple world regions, including the United Kingdom, Europe, and Canada. UK efforts are particularly notable and provide a model for us all to follow (8). We believe the establishment of similar committees in other world regions, including in the United States, is critical for driving change. These might begin by looking at strategies and guides developed in other world regions and adapting them to suit local circumstances.
More recently, the International Society of Nephrology established GREEN-K (Global Environmental Evolution in Nephrology and Kidney Care) (9), an initiative designed to be “inclusive and global, focusing on collaborative action to develop a coordinated plan to achieve low carbon kidney services across our spectrum of care” (10). Regional societies worldwide have also been invited to participate, providing a ready opportunity for them to learn from and work with others.
Is this enough? Not nearly, given what is at stake. Yet it is progress, and from its humble beginnings in Australia, it is fair to say that an increasingly global green kidney care movement is now underway.
In Australia, the ESC's plans for the coming year include:
broad kidney community engagement through establishment of a green champions network;
increased industry engagement, given that the supply chain is where the bulk of kidney care carbon emissions reside; and
concerted international collaboration because we are stronger together, and so we may learn from each other.
We aim to dig deep and give it our all. Because in the words of Agar, we can, and simply must, do better. In this, we sincerely hope others will join us.
Footnotes
References
- 1.↑
Agar JWM. Reusing and recycling dialysis reverse osmosis system reject water. Kidney Int 2015; 88:653–657. doi: 10.1038/ki.2015.213
- 2.↑
Lim AEK, et al. The carbon footprint of an Australian satellite haemodialysis unit. Aust Health Rev 2013; 37:369–374. doi: 10.1071/AH13022
- 3.↑
Agar JWM, et al. Solar-assisted hemodialysis. Clin J Am Soc Nephrol 2012; 7:310–314. doi: 10.2215/CJN.09810911
- 4.
Australian and New Zealand Society of Nephrology. Sustainable Event Guide. Accessed February 1, 2024. https://nephrology.edu.au/#sustainableeventguide
- 5.
Australian and New Zealand Society of Nephrology. Environmental Sustainability and Kidney Care Position Statement. Accessed February 1, 2024. https://nephrology.edu.au/#environmentalsustainabilityandkidneycarepositionstatement
- 6.↑
Talbot B, et al. A survey of environmental sustainability practices in dialysis facilities in Australia and New Zealand. Clin J Am Soc Nephrol 2022; 17:1792–1799. doi: 10.2215/CJN.08090722
- 7.↑
Australian and New Zealand Society of Nephrology. Environmentally Sustainable Design (ESD) Guidelines for Kidney Care Facilities. Accessed February 1, 2024. https://nephrology.edu.au/int/anzsn/uploads/ESD%20Guidelines%20for%20Kidney%20Care%20Facilities.pdf
- 8.↑
UK Kidney Association. Sustainable Kidney Care Committee. Accessed February 1, 2024. https://ukkidney.org/sustainable-kidney-care-committee
- 9.↑
International Society of Nephrology. Green K - Global Environmental Evolution in Nephrology and Kidney Care. Accessed February 1, 2024. https://www.theisn.org/initiatives/green-k-global-environmental-evolution-in-nephrology-and-kidney-care/
- 10.↑
Stigant CE, et al. Our shared responsibility: The urgent necessity of global environmentally sustainable kidney care. Kidney Int 2023; 104:12–15. doi: 10.1016/j.kint.2022.12.015