Storyline: Mark and Jack are talking about the article quoting the UN committee's report on energy resources.
Mark : Isn't there any information concerning how to control the demand?
Jack : Not exactly, but it's suggested that we reduce the energy consumption as much as possible.
Mark : __________________ How about using more renewable energy resources such as solar energy, wind and water power?
Jack : I don't think such resources have been widely used, have they?
Mark : Let's think about other alternatives, shall we?
I think we all agree with it but how?
I think we all agree of doing it but how?
I think we all agree to do so but how?
I think we all agree to such things but how?