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Chicken tops this list of dangerous foods. According to the Union's consumers, 42 percent of 484 broiler chickens tested infected by Campylobacter jejuni and 12 percent contaminated with Salmonella enterides. Moreover, grilled chicken contains dangerous-high degrees of a carcinogenic compound. This is the reason why it ranks the most notable in a very new list of the five worst foods to grill. Cancer Project dietitians learned that grilled chicken contains thousands of nanograms of HCAs that have been also seen in grilled steak, pork, salmon and hamburger. In addition, chicken also ranks first because it's essentially the most consumed food worldwide. A tighter built home means less outside air infiltrating in the home, which in turn means less oxygen to use for combustion within the furnace. As the furnace burns fuel and oxygen for combustion, it "eats up" the nearby air, which has to be "made up" with fresh air. If air cannot type in the home as quickly anymore, this could cause serious issues. As the surrounding air can be used for combustion, and not substituted for fresh air, a bad pressure in the space can take place. This could create combustion trouble for the furnace, plus consume fresh air for any person inside home.