5th story
10th story
20th story
[ Enviro-graphics ]
9
Smaller turbines have blades
25 feet
(7.6 m) long. This
is enough to power a home
or small business.
Wind power is
the most efficient.
A large wind
turbine
can produce energy to
power
1,400 homes
. The
turbine is 20 stories tall and
each blade is 351 feet
(107 meters)
long.
