discovered in September in volcanic seeps near the Italian island of Vulcano, where the water contains high levels of CO2. In February the team also explored hot springs in the Rocky Mountains in Colorado, US, where levels of CO2 are even higher. A recent review suggested that bacteria could produce useful chemicals, as well as trapping CO2, saying: “Using modified bacteria to manage CO2 has the added benefit of generating useful industrial byproducts like biofuels, pharmaceutical compounds, and bioplastics