New technology with the potential to reduce and mitigate our impact on the environment is emerging on every scale from the global to the domestic. Geo-engineering could counteract climate change by intervening in Earth’s natural systems, while new consumer technology offers greener cars and smarter homes. What are the latest ideas? And which technologies will be the most effective at securing a sustainable future? Mark Shorrock is the CEO of Tidal Lagoon Power. Davenport is CEO of Good Energy.