▁oil ▁will ▁continue ▁to ▁play ▁a ▁large ▁role ▁especially ▁in ▁developing ▁countries , ▁a ▁global ▁transition ▁to ▁where ▁their ▁alternatives ▁become ▁dominant ▁will ▁happen ▁in ▁about ▁ 5 0 ▁years . ▁Ren ew ables ▁see ▁by ▁far ▁the ▁largest ▁growth ▁rate , ▁while ▁natural ▁gas ▁makes ▁up ▁the ▁largest ▁portion ▁of ▁the ▁replacement , ▁with ▁nuclear ▁approximately ▁equal ▁in ▁share ▁to ▁renew ables . ▁ ▁T ink er ▁ends ▁by ▁emphas izing ▁that ▁energy ▁efficiency , ▁including ▁personal ▁energy ▁conservation , ▁will ▁play ▁a ▁vital ▁and ▁growing ▁role ▁in ▁a ▁successful ▁energy ▁future : ▁“ The ▁most ▁important ▁thing ▁is ▁to ▁change ▁the ▁way ▁we ▁think ▁about ▁energy , ▁so ▁we ▁can ▁change ▁the ▁way ▁we ▁use ▁it .” ▁ ▁Re views ▁" Switch ▁is ▁ref res hing ly ▁free ▁of ▁hot ▁air . ▁It ’ s ▁almost ▁shock ing ▁in ▁the ▁way ▁it ▁sid este ps ▁the ▁kind ▁of ▁issue ▁advoc acy ▁made ▁common place ▁by ▁film m akers ▁Michael ▁Moore , ▁Davis ▁G ug gen heim ▁and ▁the ▁like . ▁Lyn ch ’ s ▁film ▁tries ▁( and ▁largely ▁succeed s ) ▁in ▁taking ▁a ▁sc rup ul ously ▁neutral ▁tack ▁between ▁extrem es ." ▁- ▁The ▁Washington ▁Post ▁▁ ▁" S id este pping ▁the ▁usual ▁e co - doc u ▁strategy , ▁Switch ▁takes ▁a ▁far ▁less ▁h yst er ical ▁route . ▁Lyn ch ’ s ▁method ▁gives ▁a ▁rational ▁evaluation ▁of ▁where ▁the ▁world ▁is ▁heading . ▁It ’ s ▁consider ably ▁more ▁honest , ▁and ▁man