To overcome this obstacle, advanced nations typically provide free permits for businesses in the early stages of their emissions-cutting plans. The idea is to bring more firms into the system. Later, they can slowly begin to raise the proportion of permits they auction.
除了在減碳方向上的偏差，目前各國核定的減量總額太寬鬆、實施管制的目標又太保守，也導致碳交易飽受「只是一種自欺欺人『障眼法』」的抨擊。