▁say ▁that ▁the ▁balance ▁of ▁the ▁earth ' s ▁e col ogy ▁has ▁been ▁suffering ▁due ▁to ▁the ▁modern - day ▁dev ast ation ▁of ▁resources ▁by ▁Young er ▁Bro ther . ▁The ▁K og i ▁M amos ▁in ▁turn ▁believe ▁that ▁their ▁work ▁as ▁E lder ▁Bro ther ▁is ▁instrument al ▁in ▁helping ▁to ▁prolong ▁and ▁protect ▁life ▁on ▁earth . ▁▁ ▁In ▁a ▁des perate ▁attempt ▁to ▁prevent ▁further ▁e colog ical ▁cat ast rop he ▁and ▁destruction , ▁the ▁K og i ▁M amos ▁broke ▁their ▁silence ▁and ▁allowed ▁a ▁small ▁BBC ▁film ▁crew ▁into ▁their ▁isolated ▁mount aint op ▁civil ization ▁to ▁hear ▁their ▁message ▁and ▁warning ▁to ▁Young er ▁Bro ther . ▁The ▁subsequent ▁messages ▁and ▁warnings ▁were ▁vo iced ▁in ▁the ▁document ary ▁. ▁After ▁the ▁document ary ▁was ▁fil med , ▁the ▁K og i ▁M amos ▁returned ▁to ▁their ▁work ▁in ▁isol ation ▁and ▁asked ▁out s iders ▁not ▁to ▁come ▁to ▁their ▁land . ▁ ▁The ▁K og i ▁soon ▁realized ▁that ▁their ▁message ▁and ▁warning ▁had ▁not ▁been ▁he eded ▁by ▁Young er ▁Bro ther , ▁and ▁instead , ▁as ▁they ▁had ▁predicted , ▁many ▁cat ast roph es ▁occurred ▁and ▁the ▁natural ▁world ▁continued ▁to ▁be ▁dev ast ated ▁at ▁an ▁even ▁more ▁rapid ▁pace . ▁In ▁turn ▁they ▁contact ed ▁the ▁same ▁film maker ▁twenty ▁years ▁later ▁to ▁give ▁one ▁final ▁message . ▁This ▁became ▁Al una , ▁a ▁document ary ▁made ▁by ▁the ▁K og i ▁M amos ▁themselves ▁in