Because the effects of atmospheric carbon take years to show up as higher temperatures, limiting concentration to 450 ppm requires halting emissions at current levels.
因为大气碳含量增加表现在气候变化上要经过几年的时间，把它限制在450 ppm的水平上需要我们现在就终止排放。
The paper describe on continuous measurement of the mass concentration of particulate matter emissions from coal fired power boiler.
本文介绍了燃煤电厂锅炉排放颗粒物质量浓度的连续测定。
A laser based technique is proposed which is able to measure and supervise the mass concentration and particle size of smoke and dust in emissions.
提出了能直接测量烟尘和粉尘排放浓度和粒径大小的激光监测技术，具有实时快速、非接触、在线、无需取样和连续测量的优点。
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