Edward Baretta, interviewee: Fluorocarbons and hydrocarbons used in propellants. Abuse of these propellents by teens who discover huffing gives a high, absorbing into the body at 15 to 20 percent in atmosphere cause fibrillation of heart, can't pump blood, heart failure and sometimes death. Experiments find not as much problem to general public as once thought. With normal use of spray cans no adverse effects. Traces of these elements in atmosphere.