Amniotic fluid embolism develops suddenly and rapidly. Signs and symptoms of amniotic fluid embolism might include: Sudden shortness of breath. Excess fluid in the lungs (pulmonary edema) Sudden low blood pressure. Sudden failure of the heart to effectively pump blood (cardiovascular collapse)
Primary & Secondary pollutant. Definition: A primary pollutant is an air pollutant emitted directly from a source. A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.
Major primary pollutants produced by human activity include: 1  Sulfur oxides (SO x) - particularly sulfur dioxide, a chemical compound with the formula SO 2. 2  SO 2 is produced by volcanoes and in various industrial processes. 3  Coal and petroleum often contain sulfur compounds, and their combustion generates sulfur dioxide.he atmosphere is a complex natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has been recognized as a threat to human health as well as to the Earth's ecosystems.