Clark Williams-Derry: Programs director, leads Sightline's research and outreach efforts. Clark brings considerable powers of data geekery to blog topics like the climate change and transportation patterns. Previously, Williams-Derry served as senior analyst with the Environmental Working Group. Email: clark [at] sightline [dot] org.
A fall in teen births yields a dip in overall fertility rates.
Fewer crashes, not more, after marijuana legalization.
Billions for new highways, a pittance to repair the ones we've already got.
Lots for highway megaprojects, precious little for anything else.
Why sustainability advocates should be skeptical of the CRC.
As western coal companies dig deeper, their production costs will rise.
Bad news for coal exports, good news for everyone else.
Do what's popular: tax hazardous substances and focus on maintenance.
Basic geology is forcing coal costs to rise.
In Washington and Oregon, wind power is taking flight.