risk assessment
Climate Change Lesson #2: Watch Out for Those “Unknown Unknowns”
This is the second in a short series of homilies on the lessons we can learn from climate change. Donald Rumsfeld famously distinguished between knowns, known unknowns, and unknown unknowns. He didn’t take the occasion to provide sharp analytical distinctions, but the difference between known unknowns and unknown unknowns is very much like a difference …
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CONTINUE READINGNew EPA air toxics report presents sobering assessment of cancer risk
A new U.S. EPA report released today presents a scary picture of our exposure to hazardous pollutants in our air. The National-Scale Air Toxics Assessment for 2002, which analyzed health data based on chronic exposure to air toxics for 124 pollutants for which those data are available. (The assessment’s name is potentially confusing; the report …
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