Andrew Wheeler is about to score a big one for his coal buddies:
Reworking the mercury rule, which the E.P.A. considers the priciest clean-air regulation ever put forth in terms of annual cost to industry, would represent a victory for the coal industry and in particular for Robert E. Murray, an important former client of Mr. Wheeler’s from his days as a lobbyist. Mr. Murray, the chief executive of Murray Energy Corporation, personally requested the rollback of the mercury rule soon after Mr. Trump took office.
In a statement on Friday, Hal Quinn, president of the National Mining Association, praised the new rule, calling the mercury limits “perhaps the largest regulatory accounting fraud perpetrated on American consumers.”
Mercury is a pretty nasty neurotoxin in its elemental (particulate) form, and it's persistent; you just can't burn coal hot enough to get rid of it. But that danger pales in comparison to what happens when elemental mercury drains into or settles upon a body of water. It bonds with microorganisms and becomes motile; it comes to life in the form of methyl mercury. And when consumed by any larger organism (from fish to people), it can no longer be filtered out, so it bio-accumulates. And it becomes selective in its eating patterns, much preferring the soft neural tissues of a developing fetus. Placental barriers mean next to nothing to this creature, and that's why it's incredibly important that man-made barriers be kept in place: