The EPA restricts human exposure to PCBs at 50 ppm and is considering reducing that level even further. Many in the scientific community feel there are no safe exposure levels for PCBs. The EPA has lowered the PM exposure levels to 2.5 microns. Day in and day out. Contaminated gas is like the sorcerer's apprentice, it just keeps adding to the gas contamination levels.
Nobody goes around dumping vacum bags of dust all over their home.
Yet, the gas utility dumps their gas waste on you every day, without your permission or knowledge, and . . . Contaminated natural gas produces more indoor air pollution than tobacco or second-hand smoke. Therefore, gas combustion is the largest and most dangerous source of pollution people are exposed to. F iltered gas reduces emissions and offers cleaner, safer gas than gas utilities can provide. Because retail and consumer products use larger volumes of gas in their operations than homes do.