Pulmonary arterial hypertension is a rare but severe disease with an estimated five-year survival rate of only 57% after diagnosis, according to the Registry to Evaluate Early And Long-term PAH disease management (REVEAL), which registers data from patients in the United States.
Concentration of elements in the ocean relative to the total concentration in the bulk silicate Earth (BSE). Of all the elements, only Cl and Br have a significant fraction in the ocean (see inset), indicating the extreme hydrophilic character for the heavier halogens.
Chlorine Gas - Facts, Danger & Safety. The chlorine element, under normal atmospheric conditions, is a pale green gas with a density significantly greater than that of air. For this reason the substance may pool at the base of poorly ventilated areas. Chlorine is a highly toxic hazardous chemical produced and used in large volumes throughout many industries.