Environmentalists should think twice before celebrating the week that shook Big Oil to the core. Green activist victories against Shell, ExxonMobil, and Chevron are pregnant with unintended consequences. 
One of them is to interfere with future crude supply just as the market tightens ineluctably as a result of declining oil wells and chronic lack of past investment, increasing the risk of a violent price spike in the early 2020s and a disruptive shock before the world has reduced its economic dependency…

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