Microbes have an immense influence on the equilibrium and health of our planet. Their genetic and metabolic diversity eclipses that of all other organisms. For example, they make thousands of different gases that can serve as stress protectants and signalling molecules, or simply be waste products. Many of these volatile compounds can affect Earth’s climate when they escape from the soil or sea into the atmosphere. They are even being investigated as chemical signs of life beyond Earth. Other microbes can break down these gases, preventing them from entering the atmosphere, often using them to support their own growth. Some microbial gases are also harnessed by humans to make biofuels.

This talk, given by Professor Terry McGenity from the School of Life Sciences at University of Essex will explore the diversity of microbes, and the smells, functions and global impacts of their gases. One of the most abundantly produced volatile organic compounds, isoprene, will be examined in depth.