The Environmental Protection Agency’s proposed standards for heavy-duty diesel engine emissions in 2007 have produced an argument that has bounced back and forth for months among engine manufacturers, the makers of antipollution devices and oil refiners.
The problem is that two of the participants in this debate feel they cannot meet the standards without the others, and some are not sure the standards can be met at all.
In calling for a 40% reduction in nitrogen oxides and hydrocarbon emissions by 2004 followed by a 90% reduction in particulate matter and a 95% reduction in nitrogen oxides by 2007, the EPA is “forcing technology,” said Glen Keller, the former president of the Engine Manufacturer’s Association. By that, he means that EPA is mandating requirements that engine manufacturers say are beyond the reach of current technology.
Such a practice is not unusual, especially in environmental regulation. In theory, setting a goal not currently attainable — with financial penalties for non-achievement — forces manufacturers to address an issue, like emissions, that they might otherwise table.
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