Guy Henderson reports from the Extreme E rally in Dorset- an event that's been described as an electric odyssey that fuses together science, adrenaline sports and high-end engineering. The international off-road racing series sees spec silhouette electric SUVS raced to highlight the impact of climate change and human interference. 

With extensive exposure to air, rain and pollution, concrete structures tend to get dirty, discoloured and fractured. But scientists in China have created the cement of the future to help keep buildings safe. Tech it Out's Yang Zhao talks to Xu Xin, from the University of Science and Technology of China, about the innovation that is water-resistant concrete.