rn

a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health

आर एन ए हस्तक्षेप जैसी चीज़ों के बारे में कुछ साल पहले ही जाना है,

Plastic containers and other forms of rnan - made garbage cause ocean contamination.