neveforget wre you co fro becausyou comerom a litt place cled mosslle. u never rget where u come from. oft poignt music] [child chattering] [sinr hummin oft poignt music - on there w a commuty found by freslaves who lid in pea d happins. i wa people knowe existe [tv stic] [sombemusic] ♪ ♪ ♪ [soft poignant music] ♪ ♪ ♪ [laid-back blues music] ["man done wrong" by valerie june] ♪ - [announcer] major funding for reel south was provided by etv endowment, the national endowment for the arts, center for asian-american media and by south arts. additional funding for "mossville: when great trees fall" was provided by: ♪♪ u're wating pbs. ♪♪ >> today, on "earth focus," the risi cost of changing climate. coming up, on "earth focus." we have never confronted a crisis like this. in its early stages it's producing record- breaking heat, coastal flooding, and extreme precipitation. and the cost is way too high in lives lost, in damage to propey, and livihood. and it may get worse. unless addressed, climate change stands to affect the security of the nation, the stabil