barrier
biggest
border
brazil
brazilian
bridge
capacity
concrete
dam
ecological
ecology
electric
electrical
electricity
energy
engineering
flow
flowing
generate
generator
huge
hydro
hydroelectric
hydroelectricity
hydropower
industrial
industry
itaipu
landmark
large
largest
outdoors
paraguay
paraguayan
parana
plant
power
powerplant
production
project
renewable
river
station
stream
technology
turbine
water
wonder
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