Discusses the measurement and conceptual difficulties of assessing the benefits of environmental improvements in monetary terms, in the context of a study undertaken to evaluate the health‐related benefits of improved air quality in a large, diverse urban population. Describes an...

As CO2 equivalent gases increase beyond a doubling, there will likely be unavoidable damage to U.S. agriculture. In equatorial regions of the world, damage from global warming will occur earlier than in the U.S. Biogeophysical lags, including deep-ocean mixing with warmer surface waters, can...