Pigs (the ones you send through pipelines for maintenance and inspection purposes) may not be capable of finding the sorts of cracks that led to a 5,000 barrel spill from ExxonMobil’s Pegasus pipeline in March. “Smart pigs are the linchpin of the industry’s efforts to monitor pipes, but they aren’t reliable for finding all serious flaws.” [Wall Street Journal]

Some of our readers really aren’t going to like this…a piece by Peter Singer, a bioethics professor at Princeton, about why a War on Coal is necessary. “To develop new coal projects is unethical, and to invest in them is to be complicit in this unethical activity.” [Project Syndicate]

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