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2. Cost to make railroad crossings safer is skyrocketing. It ...

   www.aol.com/cost-railroad-crossings-safer...

   In a transportation report outlining projects for fiscal years 2013 through 2017, MoDOT said that the average highway-rail crossing project costs $200,000 to $250,000, resulting in improvements to ...

3. Fireplace insert - Wikipedia

   en.wikipedia.org/wiki/Fireplace_insert

   The fireplace insert was invented in 1742 by Benjamin Franklin, which he called 'The Pennsylvania Fireplace' (also known as the Franklin Stove), in the United States.He came upon the idea as a means of using coke (a smokeless fuel made by the destructive distillation of certain types of coal) and incorporated the use of an electric blower to improve efficiency.

4. Fireplace - Wikipedia

   en.wikipedia.org/wiki/Fireplace

   There are also air quality control issues due to the amount of moisture they release into the room air, and an oxygen sensor and a carbon monoxide detector are safety essentials. Direct vent fireplaces are fueled by either liquid propane or natural gas. They are completely sealed from the area that is heated, and vent all exhaust gasses to the ...

5. Flame supervision device - Wikipedia

   en.wikipedia.org/wiki/Flame_supervision_device

   For gas appliances, a flame supervision device (FSD) – alternative name: flame failure device (FFD) – is a general term for any device designed to stop flammable gas going to the burner of a gas appliance if the flame is extinguished.

6. Guard rail - Wikipedia

   en.wikipedia.org/wiki/Guard_rail

   Some facility safety steel guardrail systems utilize one horizontal rail, where others employ two or three rails. While a single rail safety guardrail located some 15 inches (38 cm) above floor level may be sufficient to control vehicle traffic, it could present a trip hazard to pedestrians since it is not as noticeable as a double or triple ...

7. Doctors Say This Is How You Can Loosen and Clear Mucus From ...

   www.aol.com/lifestyle/doctors-loosen-clear-mucus...

   Try using a humidifier to “maintain humidity levels between 35-45% in your home ... If taking the natural route didn’t clear your chest congestion, there are some over-the-counter solutions ...