america
barrage
barrier
biggest
binacional
brazil
coastline
concrete
dam
ecology
electric
electricity
energy
environment
facility
generate
generator
hydro
hydroelectric
hydroelectricity
industry
itaipu
lake
landscape
largest
panorama
paraguay
parana
peace
plant
power
project
renewable
river
strength
technology
tourism
travel
turbine
view
water
watt
wave
wire
work