Q4. Do you think climate change will have an affect on Canada/Vancouver in...

I agree that this is vague in terms of survey questions. "An affect" could mean many things.

I do think a question along these lines would be good for measuring how many people think climate change is an impending threat or something that will not result in any impact for a very long time. Unfortunately, I'm not quite sure how to word a successful question evaluating this feeling in participants. Maybe instead of "an affect" we could say "a noticeable affect"