Scientists/ looking/ alternative/ energy/ sources

1. Scientists/ looking/ alternative/ energy/ sources
2. I/ suggest/ not/ turn/ lights/ when/ room/ light enough
3. It necessary/ use/ energy-saving bulds/ istead/ ordinary bulds
4. if/ we/ go on/ waste/ water/ there/ a shortage/ fresh water
5. How about/ take/ a shower/ instead/ a bath-tub/ save/ water