More than 2 months ago, oil near a tar sands site in Cold Lake, Alberta, started leaking. It has since made its way through an adjacent swampy forest, destroying vegetation and killing wildlife. Alarmingly, the leak's source is unknown. The gushing crude can't be stopped. It began after Canadian Natural Resources Ltd. began extracting oil through injections of high-pressure steam, driving crude to the surface. The process is called "cyclic steam stimulation," is reminiscent of controversial hydraulic fracturing used to obtain natural gas. This is the latest of many mishaps associated with tar sands oil, which should give us pause before reflexively granting the industry further pipeline rights, etc. We were told we could expect one spill every 7 years, but there have been 12 injust 1. It's also good reason to be skeptical of safety promises made for the Penokee mine slated for Northern Wisconsin. Resource corporations just don't have a strong enough environmental protection record to warrant much citizen confidence.