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  Carbon dioxide (CO2) - This is by far the most emitted form of human caused air pollution. Although CO2 is currently only about 405 parts per million in earth's atmosphere, billions of metric tons of CO2 are emitted annually by burning of fossil fuels.