MPR (Microparticle Performance Rating) Developed by 3M for its Filtrete brand, MPR focuses specifically on capturing microscopic particlesthose smaller than 1 micron, including bacteria, smoke, and fine dust
Food and Drug Administration and the National Heart, Lung, and Blood Institute
Twenty years ago, we passed a law to ban smoking in workplaces to ensure that workers were not exposed to carcinogens and cancer-causing elements, but theres only one group of people in this state who were left behind - casino workers - and they are not going to stand for it. Representative Tanzi and State Senator Susan Sosnowski have introduced bills, H5464 and S0188 , to ban smoking in Rhode Island casinos
So, its hard to compare the results of something when you have no control over what individuals are using or how theyre using them, he said