The creators of the show “South Park” have issued a rare apology, reprising the character ManBearPig to make amends for a dis that is more than a decade old. In a 2006 episode during season 10 of the animated series, Al Gore issues a stern warning to the students of South Park Elementary School about the “single biggest threat to our planet.” He was talking about ManBearPig, a creature meant to represent climate change... “South Park” was effectively mocking the global issue at the center of “An Inconvenient Truth.” Now, 12 years later, show creators Matt Stone and Trey Parker...