What role does atmospheric electricity play in climate change? Two scientists (Mai-Mai Lam, from the British Antarctic Survey, in Cambridge UK, and Jean Lilensten from CNRS in Grenoble, France) discuss this topic. This movie was produced by COST Action TOSCA (Towards a more complete assessment of the impact of solar variability on climate), a multidisciplinary European network of scientists from 20 countries whose objective is to provide a better understanding of the hotly debated role of the Sun in climate change. For more information, and more movies, see http://www.tosca-cost.eu