I agree. Imagine if we had tried to tackle ozone depletion by saying "thou shall not buy CFCs nor use products or services which make use of CFC" and had create

I agree. Imagine if we had tried to tackle ozone depletion by saying "thou shall not buy CFCs nor use products or services which make use of CFC" and had created a "CFC personal footprint" and set about finding those individuals whose choices seemed to create the worst measure of CFC footprint. It's just madness! Instead we regulated them and the problem resolved.