1. We will use waves as an environmentally friendly energy source. -
> Waves will ............be used as an environment........ friendly energy source.
2. Move/ big/ company/ factory/ city/ countryside/ help reduce/ traffic jam/ . 
-> ......................Moving big companies and factories from cities to the countryside can also help to reduce traffic jams.....................................................
3. People/ use/ public transports/ reduce/ number/ private vehicles/ road/ .
> ..................People should use public transports to reduce the number of private vehicles on the road............................................................