Coffee stands as the world's seventh most traded commodity, with over 2 billion cups consumed daily. Climate change threatens this vital product, causing Arabica bean prices to surge 80% in 2024 while impacting 25 million farming households globally. Coffee's environmental footprint further compounds these challenges, making efficient brewing increasingly critical.

Physics researchers discovered coffee brewing doesn't follow Darcy's law beyond 5 bars, with optimal pressure between 6-9 bars. Using X-ray micro-CT scans and precision measurements, the team found increased pressure beyond 8-9 bars yields diminishing returns as coffee puck pores collapse faster than pressure can boost flow.

This scientific approach offers practical solutions for reducing waste while improving coffee quality. By understanding the complex poroelastic dynamics of extraction, both professional baristas and home brewers can optimize techniques, potentially reducing coffee needed without sacrificing taste amid climate challenges that threaten the entire coffee supply chain.