"Economics has a powerful role to play in providing data-driven assessments to policymakers about how we can make the energy transition faster, cheaper, and more equitable." –Hunt Allcott

A growing awareness that time is running out should help to foster progress at the UN Climate Change Conference in Dubai, but the real test will come after, when promises must be kept.

Declining coal use helped shrink U.S. emissions 3%, according to the Global Carbon Project, even as global emissions keep the world on a path to exceed 1.5 degrees Celsius of warming before 2030 and 1.7 degrees soon after.