1 General
Are there any plans to build the biggest wind farm in the world on a Scottish island in the north of Britain?
2 Alternative
Do wind farms make electricity or central heating without harming the environment?
3 Disjunctive
Wind farms are very noisy for people who live nearby, aren’t they?
4 To the subject
What gives us a small amount of the electricity we need?
5 Special
What are we always going to need?