Stop focusing on energy usage and start focusing on energy generation. It doesn't matter how much energy we consume if it comes from renewables.
It does matter because of the side effects (pollution, etc.). The environment and how it affects humanity is a complex system with many variables. Both generation and consumption are in there.
Renewables are not without impact. We shouldn't consume mindlessly just because we might eliminate fossil fuels some day.
What good does PV generated energy make if all that energy is used to generate heat and evaporating water?
[dead]
It does matter because for now renewables are manufactured mostly with coal and oil
EDIT: I'm not a renewable skeptic, answers bellow
Which is why we have just paid billions of dollars to cancel a renewable power project. And are imposing extra fees on cars that can be driven on renewable energy.
So, now I'm focused. I'm very focused.