IF THE sinking Maldives aren’t enough to galvanise action on climate change, could losing a classic beer do it? Climatologist Martin Mozny of the Czech Hydrometeorological Institute and colleagues say that the quality of Saaz hops – the delicate variety used to make pilsner lager – has been decreasing in recent years. They say the culprit is climate change in the form of increased air temperature.

Mozny’s team used a high-resolution dataset of weather patterns, crop yield and hop quality to estimate the impact of climate change on Saaz hops in the Czech Republic between 1954 and 2006. Best-quality Saaz hops contain about 5 per cent alpha acid, …