Cement plants are America's fourth-largest source of airborne mercury, generating about 23, 000 pounds (10, 400 kilograms) a year, EPA says.
环境署称，水泥工厂是美国空气中汞污染物的第四大来源，每年产生约23000磅（10400公斤）的汞污染物。
Scientists at the EPA have long favoured such a ruling, which did not contain any specifics about reducing emissions of the pollutants.
环保局的科学家们长期以来倾向于这样一条原则，就是不抑制任何可以降低污染物排放的具体措施。
The EPA said the science about the dangers posed by greenhouse gases was compelling and overwhelming, and that the increase of such gases was the unambiguous result of human emissions.
美国环境保护署称，由于温室气体的危害应运而生的科学分支是不可忽视的，而这些气体的增加正是人类排放的结果。
You'll want to hire an EPA-certified water testing company; tests run about $20.
你可以花20美元，聘请由美国环保署认证的公司帮你测试。
Such research might reveal more about the mechanisms of action that DHA and EPA use, the sites upon which they act in the human body, and the genes that control these mechanisms.
如此的研究可能显示更多关于EPA和DHA使用的作用机制，以及它们作用于人体的位点和控制这些机制的基因。
She added that the U.S. Environmental Protection Agency EPA canceled its approval for field tests using the organism once she had told them about her research in 1999. CET-6, 2005.6.
她还说，在1999年她告诉她的研究结果后，美国环境保护局(EPA)取消了野外生物测试的许可。
The EPA says there is no need to worry about existing retaining walls, because there is no evidence that pressure treated lumber poses any significant risk.
环保局说，没有必要担心现有的护土墙，因为没有这种压力处理的木材构成重大威胁的证据。
The EPA paper tells us about a dietary risk assessment for humans.
美国环保局的论文对我们讲述对人类的饮食风险进行评估。
According to an EPA study, about of the particulate matter floating over Los Angeles can be attributed to China.
根据美国环保暑的一份研究表明，洛杉矶上空约四分之一的悬浮粒子可能都与中国有关。
The Environmental Protection Agency (EPA) has compiled an enormous amount of research on dirt consumption. About 45 percent of the stuff we inhale or inadvertently eat is soil, and 55 percent is dust.
环境保护署汇集了大量关于吸入灰尘的研究，我们吸入或无意间吃下去的大约45%是土，55%是灰尘。
The Environmental Protection Agency (EPA) has compiled an enormous amount of research on dirt consumption. About 45 percent of the stuff we inhale or inadvertently eat is soil, and 55 percent is dust.
环境保护署汇集了大量关于吸入灰尘的研究，我们吸入或无意间吃下去的大约45%是土，55%是灰尘。
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