On April 29, the Environmental Protection Agency (EPA) hosted a second and last public hearing on the proposed Tier 3 rule which would reduce the allowed concentration of sulfur in gasoline. Automobile manufacturers, engine manufactures, environmental proponents, public health advocates, and state regulators all expressed support for the rule. The automotive makers urged the EPA to harmonize the rule with California’s Low Emission Vehicle III standards in addition to urging the petroleum industry to comply with the rule. Representatives from the petroleum industry expressed opposition to the rule, saying they found compliance with the rule will cost their industry $2.4 billion annually. The written comment period for the rule is open through June 13.