Abstract: . . .  Oregon, C alifornia, are the sta a n d Ne w tes produ York cing the la hydroelec rgest amo tricity. unt of Worldwid e s One -fifth of a ll the worl generated d ’s electr icity is by hydrop ower. s Tw enty-four countries get ab out of their e lectricity 9 0 percen from wate t Norway, B rpower, in razil, Para cluding guay, Eth and Zamb iopia, Gha ia . na, s DATA FI LE: Hydr Califor opow Data avai lable in 2003 ENERGY FOR KEEPS: ELECTRICITY FROM RENEWABLE ENERGY 77 78 ENERGY FOR KEEPS: ELECTRICITY FROM RENEWABLE ENERGY  . . .
. . .  alifornia, are the sta a n d Ne w tes produ York cing the la hydroelec rgest amo tricity. unt of Worldwid e s One -fifth of a ll the worl generated d ’s electr icity is by hydrop ower. s Tw enty-four countries get ab out of their e lectricity 9 0 percen from wate t Norway, B rpower, in razil, Para cluding guay, Eth and Zamb iopia, Gha ia . na, s DATA FI LE: Hydr Califor opow Data avai lable in 2003 ENERGY FOR KEEPS: ELECTRICITY FROM RENEWABLE ENERGY 77 78 ENERGY FOR KEEPS: ELECTRICITY FROM RENEWABLE ENERGY  . . .
. . . Renewable Energy Source: HYDROPOWER VOCABULARY flow head horsepower impoundment penstock pumped storage run-of-river (diversion) tailrace water cycle F L O W I N G WAT E R is one of nature’s most powerful forces. Humans began harnessing this energy force several thousand years ago. By the first century B.C., waterwheels were working in many parts of the world, including Greece. In fact, the term hydro comes from an ancient Greek word for water. For centuries waterwheels provided the energy to grind grain and saw lumber. . . .
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