1 The largest school district by enrollment with an election in 2016 is Wake County Public School System with 153,534 K-12 students.  The smallest North Carolina school district among the nation's largest with an election in 2016 is Duplin County Schools with 9,628 K-12 students.
Freon only remains a liquid while under pressure inside your refrigerator's cooling system. The chemical changes to a gas as soon as it contacts the air. This means, when you smell freon in and around your refrigerator, you're also inhaling varying amounts of freon gas. According to the Environmental Protection Agency, freon gas is denser than air and travels very slowly to the upper atmosphere.
window air conditioner image by Aaron Kohr from Fotolia.com. Freon is the trade name for a group of man-made chemicals called chlorofluorocarbons (CFCs). CFCs contain chlorine, fluorine and carbon and are often found in air conditioners and refrigerators. The manufacturing and use of Freons is restricted and is gradually being phased out. People are usually exposed to Freon by accidentally or deliberately breathing it in.