The debate continues regarding the effects of delaying the Environmental Protection Agency's new emission-reduction rules for the cement industry. Many cement manufacturers say they need more time to reassess their emissions-control strategies beyond 2015, the year the EPA intends to impose restrictions. Pennsylvania-based firms such as Essroc and Keystone Cement Co. are working to comply with those costly standards but these rules could cause "severe hardship" for the industry in terms of plant shutdowns and layoffs in the future, according to the Portland Cement Association.

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