The rapid expansion of energy storage is of course great news for our ability to deploy and use renewable energy – but doing so is not without its own challenges. Batteries require raw materials from all across the world and an ever more complex supply chain; pumped storage sites require major changes to land use and access; and what can we do with facilities or assets that reach the end of their life – is it better to re-use, recycle or decommission? And how do developers and investors ensure their commitments meet ever stricter guidance when deciding which projects to pursue? Sorting the E’s from the SG’s is Professor Simon Pringle, who heads up the newly created Sustainability and ESG Hub at BDO and Peter Kavanagh, the chief executive and founder of developer and asset operator Harmony Energy. The Megawatt Hour is a special podcast series brought to you by Energy Voice Out Loud in paid partnership with BDO.