Coilín ÓhAiseadha and Ronan Connolly are Dublin-based researchers and co-authors of a recent academic paper that found global spending on climate change projects totaled nearly $3.7 trillion between 2011 and 2018. Robert talks with them about why more than half of climate-related spending is being garnered by solar and wind, the merits – and problems -- of various energy sources, why more spending should be directed toward climate adaptation, and why there is no panacea when it comes to our energy and power needs.