▁world ▁to ▁find ▁out . ▁His ▁first ▁step ▁is ▁to ▁calculate ▁how ▁much ▁energy ▁the ▁average ▁person ▁uses ▁in ▁a ▁year , ▁including ▁all ▁the ▁energy ▁emb od ied ▁in ▁the ▁food ▁and ▁products ▁we ▁consume , ▁the ▁roads ▁and ▁public ▁buildings ▁we ▁share . ▁He ▁uses ▁that ▁figure ▁to ▁measure ▁and ▁compare ▁each ▁energy ▁type ▁he ▁vis its . ▁ ▁T ink er ▁starts ▁with ▁the ▁big ▁conventional ▁energ ies , ▁coal ▁and ▁oil , ▁trying ▁to ▁determine ▁their ▁fut ures . ▁Can ▁coal ▁be ▁clean ? ▁Will ▁we ▁keep ▁using ▁it ? ▁Will ▁oil ▁price ▁keep ▁rising ? ▁Will ▁we ▁run ▁out ▁of ▁it ? ▁He ▁then ▁exam ines ▁the ▁energ ies ▁that ▁may ▁replace ▁them . ▁For ▁oil , ▁those ▁are ▁bio fu els , ▁natural ▁gas ▁and ▁electric ity . ▁For ▁coal , ▁they ▁are ▁ge oth erm al , ▁solar , ▁wind , ▁natural ▁gas ▁and ▁nuclear . ▁▁ ▁With ▁each ▁type , ▁he ▁vis its ▁some ▁of ▁the ▁world ’ s ▁leading ▁facilities , ▁tal ks ▁to ▁top ▁exper ts ▁in ▁the ▁Department ▁of ▁Energy , ▁univers ities ▁and ▁within ▁each ▁industry , ▁and ▁gives ▁a ▁conc ise ▁and ▁objective ▁analysis ▁of ▁each ▁resource ’ s ▁major ▁pros ▁and ▁cons . ▁The ▁expert ise ▁of ▁the ▁interview ees ▁and ▁the ▁access ▁to ▁restricted ▁energy ▁sites ▁is ▁un par alle led ▁in ▁other ▁energy ▁films . ▁ ▁After ▁his ▁journey , ▁he ▁assemb les ▁his ▁find ings ▁to ▁map ▁out ▁the ▁likely ▁energy ▁future . ▁While ▁coal ▁and