Scientists are working hard to __________ turbines more efficient.
turn
push
show
make
Wind energy may not __________ all of our problems.
break
explain
fix
solve
Wind is a __________ resource—it never runs out.
hidden
renewable
dangerous
regular
Turbines must be placed in locations where wind is strong and __________.
sunny
steady
cold
noisy
Wind was used to move sailing ships across the oceans and to __________ machines like windmills.
drive
break
power
fix
Some people say turbines spoil the __________ of natural places.
weather
safety
beauty
history
In the future, it might help us __________ a healthier planet.
build
control
save
test
Now we use it to __________ electricity.
sell
generate
share
protect
It does not produce __________ gases or harm the environment.
harmful
strong
colorful
deep
It’s difficult to __________ the electricity to where it is needed.
remove
discover
deliver
protect