Supply the correct form of the words

I.Supply the correct form of the words:
1.Solar energy will be used as an (enviroment)friendly source of energy
2.We should reduce the use os (electric)at home
II.Rearrange the words to make meaningful sentences.
1.Solar energy/by/in/the word./many countries/will be used
2.to save/will reduce/energy/the use of water/We/.
3.People/until/flying cars/use/won't/the year 2050.
4.traffic/are/rush-hour/the/always/There/jam/during/.
5.to another/How/you travel from/will/one place.