The world needs to double its global rate of improvement in energy efficiency. To get there will require a massive effort—and right now, the United States is lagging behind.
Big buyers of electricity have keyed in on a single metric, but a more holistic understanding of leadership can unlock creative ways to accelerate the renewables revolution.
China's tariff on U.S. soy could drive production to South America. Without precautions, deforestation could follow.