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

Yes I agree with the question above, it is very concise and I too see a problems if we fail to separate Canada and Vancouver. I also think that it could be measured on a 1-5 scale, asking;

To what extent do you believe climate change will have a lasting effect on Canada's environment in the next 20 years? 1 = little effect, through to 5 = devastating permanent effect.

Through this means of measurement you gain perspective into the extent of how bad the population believes the effects of climate change will be rather than a general perception of the lasting effects.