The climate impact of research computing, computer science, and computational science is hard to understate. Computing impacts the environment in many ways, from water and abiotic resource usage to GHG emissions from energy consumption and electronic waste. For many researchers, the CO$_2$e (CO$_2$-equivalent, the usual metric of carbon footprint aggregating the main GHGs) cost associated with running their models is larger than that of any other aspects of their life [@PortegiesZwart_2020]. The global carbon footprint of data centres is estimated at 126 Mt CO$_2$e [@Malmodin2024], equivalent to the entire American commercial aviation sector, and individual computing projects can reach dozens, if not hundreds, of tonnes of CO$_2$e [@PortegiesZwart_2020; @GrealeyLannelongue2022; @Luccioni_Viguier_Ligozat_2022]. This is becoming clear to researchers and funders, who are exploring different approaches to reducing and accounting for the climate impact of the research they commission [@Weber_2024; @Juckes23; @Lannelongue_Fropier_Matencio_2025]. There is a clear need to provide tools for motivated researchers to minimise the detrimental contribution of their research on the climate emergency, and to educate researchers around this impact.
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