than 50 percent, to alter trade flows such that the average pollution intensity difference associated with such covered product is not greater than 50 percent, (ii) in the case of any covered product for which the average pollution intensity difference is greater than 25 percent and not greater than 50 percent, to alter trade flows such that the average pollution intensity difference associated with such covered product is not greater than 25 percent, and (iii) in the case of any covered product for which the average pollution intensity difference is not greater than 25 percent, to alter trade flows such that the average pollution intensity difference associated with such covered product is not greater than 10 percent. (B) Phase two goals During the 6-year period subsequent to the initial 6-year period described in subparagraph (A), the goal for establishment of the variable charge with respect to any covered product shall be— (i) in the case of any covered product which, for the initial 6-year period described in such subparagraph, was described in clause (i) of such subparagraph, to alter trade flows such that the average pollution intensity difference associated with such covered product is not greater than 25 percent, (ii) in the case of any covered product which, for the initial 6-year period described in such subparagraph, was described in clause (ii) of such subparagraph, to alter trade flows such that the average pollution intensity difference associated with such covered product is not greater than 10 percent, and (iii) in the case of any covered product which, for the initial 6-year period described in such subparagraph, was described in clause (iii) of such subparagraph, to maintain achievement of the goal described in such clause. (C) Phase three goals For any year subsequent to the period described in subparagraph (B), the goal for establishment of the variable charge with respect to any covered product shall be to alter trade flows such that the average pollution intensity difference associated