根據美國環保署4月30日所公佈的最新數據指出，2006年初步的空氣品質和排放量數據，顯示其國內的空氣品質長期以來持續地在改善。在清淨空氣法案的權限下，美國環保署針對6大重要污染源——二氧化氮、臭氧、二氧化硫、微塵、一氧化碳和鉛，訂立了國家空氣品質標準。
自1970年以來，這6項污染源的排放量已減少一半，每項污染源的國內平均排放濃度也低於其對應的空氣品質標準。在部份監測地點的年均污染程度，的確還是有一項或一項以上的污染源排放量超出空氣品質標準，而臭氧和微塵則是最常見的污染問題。
改善情況方面，以一氧化碳排放量改善最多，以1990年的排放標準值為基準，減少了62%，鉛減少了54%，二氧化硫則是減少53%。環保署指出，隨著6大污染源排放量下降，以及形成六大污染源複合物的減少，美國經濟仍持續繁榮成長。
Preliminary air quality and emissions data for 2006 shows continued improvement in the nation's air quality over the long term, according to the latest figures from the U.S. Environmental Protection Agency, EPA, released today. Under the Clean Air Act, the EPA sets national air quality standards for six key pollutants - nitrogen dioxide, ozone, sulfur dioxide, particulate matter, carbon monoxide and lead.
Emissions of these six pollutants have dropped by more than half since 1970 and the national average concentration for each criteria pollutant is below the level of its air quality standard. Annual pollution levels at some monitoring sites do remain above one or more of the national air quality standards, with ozone and particulate matter remaining as the most persistent problems.
Carbon monoxide levels show the greatest improvement, down 62 percent from 1990 levels; lead is down 54 percent and sulfur dioxide is down 53 percent from 1990 levels. The EPA points out that while emissions of the six key pollutants and the compounds that form them continue to decline, the United States has continued to grow and prosper.
作者
In my healing journey and learning to attain the breath awareness, I become aware of the reality that all the creatures of the world are breathing the same breath. Take action, here and now. From my physical being to the every corner of this out of balance's planet.
