Ding dong, the climate hoax is dead.  Twenty years after Al Gore’s apocalyptic movie “An Inconvenient Truth,” the Trump administration has put the final nail in the coffin of the lie that scared a generation into believing the planet was about to explode in flames if they kept using fossil fuels.  In what the White House calls “the largest deregulatory action in American history,” the EPA on Thursday will repeal an Obama-era proclamation that has mandated greenhouse-gas regulations for 17 years,