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Advocates for the cement industry in the U.S. and environmentalists are facing off in hearings as federal regulators call for comment on new rules to limit emissions from the energy-intensive kilns that are core to the business. The Portland Cement Association (PCA), says the rules would be ?EUR??,,????'?????<?devastating to the U.S. cement industry.?EUR??,,????'?????<?
Portland cement is the most commonly used type of cement in the world. The association contends the regulations would result in $340 million in new costs to the industry, lead to a 10 percent drop in domestic production, make the business vulnerable to out-sourcing and jeopardize industry stability as the country seeks to pull out of its economic troubles.
Cement production is responsible for about 5 percent of the world?EUR??,,????'?????<???EUR?s CO2 emissions and the U.S. is the world?EUR??,,????'?????<???EUR?s third-largest producer of cement behind China, the No. 1 producer, and India. The EPA?EUR??,,????'?????<???EUR?s new rules would affect 93 Portland cement manufacturing sites in the U.S. and Puerto Rico, the cement trade group says. Environmentalists and people who live near the cement plants say the regulations, which were proposed in April, are a long time coming. Organizations such as the Natural Resources Defense Council have pushed federal regulators to curb kiln emissions for years. Portland cement kilns are the fourth-largest source of mercury missions in the U.S., says the EPA. The kilns are heated to temperatures of 2,700-3,000 degrees Fahrenheit in order to convert raw materials that include lime, silica, aluminum and iron into Portland cement. Mercury and other hazardous emissions are released in burning fuels to heat the kilns and in the conversion process.
The EPA?EUR??,,????'?????<???EUR?s proposed regulations would result in slashing annual emissions of several substances related to Portland cement kiln operations. Releases of mercury would drop by 11,600 pounds, a reduction of 81 percent; total hydrocarbons, 11,700 tons, or 75 percent; particulate matter, 10,500 tons, or 96 percent; hydrochloric acid, 2,800 tons, or 94 percent; and sulfur dioxide,160,000 tons, or 90 percent, according to the EPA.
Source: GreenBiz.com
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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