environmental
architecture
built
concrete
conservation
construction
dam
eco
ecological
education
electric
electricity
energy
engineering
environment
facility
flow
generating
generation
generator
green
hydro
hydroelectric
hydropower
industrial
industry
mountain
moving
natural
nature
outdoors
place
plant
power
powerhouse
powerstation
renewable
reservoir
resources
river
serbia
spillway
station
stream
structure
supply
technology
turbine
water