This provides an equal incentive at the margin for all polluters to reduce their emissions. He levied large fines on polluters and reformed public works contracts. Enforcement methods include fines and sanctions for polluters that have exceeded their allowances. The group supports increased taxes for polluters and incentives for environmentally beneficial practices. Amherst placed FirstEnergy 9 out of the top 100 of the country's largest greenhouse polluters. Local authorities were authorized to regulate smaller polluters. Temple-Inland did not appear on the 2010 PERI Toxic 100 Air Polluters report. Private agreements are established between "polluters" and other affected parties. Some states are much more prolific polluters than others. Such credits can be bought by polluters that have a regulatory limit. The Caribbean Islands are the biggest plastic polluters per capita in the world. The villains were still polluters, albeit polluters from a different world. Of the top thirty global polluters per capita, ten are from the Caribbean region. The primary polluters were Pennsylvania iron and steel mills. Thailand is among the world's worst plastic polluters.