Global warming is one of today's greatest challenges. The science of climate change leaves no doubt that policies to cut emissions are overdue. Yet, after twent

An atmospheric scientist explains why global climate change mitigation and energy decarbonization demand American diplomacy, technology, and policy "Daniel Coha

The issues that increasingly dominate the 21st century cannot be solved by any single country acting alone, no matter how powerful. To manage the global economy

No environmental issue triggers such feelings of hopelessness as global climate change. Many areas of the world, including regions of the United States, have ex

Americans are the most mobile society in history, yet their transportation system is on the verge of collapse. O'Toole explains how the nation got itself into s