The only "blow to the Keystone pipeline" is in the exaggerated reporting of the science...
The "report" (Kurek et al., 2013) did find slight elevations (relative to 1950) of polycyclic aromatic hydrocarbons (PAH) in five lakes in the vicinity of the Fort McMurray, near oil sand mining and upgrading operations in NE Alberta. The PAH flux trends in four of the lakes were unremarkable compared to the control (Namur Lake).
More evidence that the greenies care nothing for anything except scaring people and advancing a gaia-first--humans-last mentality. The greenies will not be happy until every last human is wiped from existence, just like the "Mr. Smith" character in the Matrix movies.
