As world leaders gather this week in Egypt for the United Nations Climate Change Conference, or COP27, extreme weather events like hurricanes, heat waves and drought continue to increase in intensity and frequency. Yet despite this worldwide four-alarm fire, climate diplomacy has stalled between the world’s top two greenhouse gas emitters: the U.S. and China. This refusal to cooperate has costly consequences — not least is the potential to stymie progress on rapidly deploying low-carbon energy technologies that are critical for averting the worst consequences of climate change. Solar photovoltaics is a prime example. In the last decade (2010 –…