Classified as primary or secondary pollutants can be. Primary pollutants they have elements that directly emitted from a process such as the volcanic ash from the explosion, the motor car carbon mono Oxide gas emanating from factories Sulphur di-oxide gas प्रदूषकों को प्राथमिक या द्वितीयक के रूप में वर्गीकृत किया जा सकता है.प्राथमिक प्रदूषक वे तत्व हैं जो सीधे एक प्रक्रिया से उत्सर्जित हुए हैं जैसे ज्वालामुखी विस्फोट से राख मोटर गाड़ी से कार्बन मोनो ऑक्साइड गैस कारखानों से निकलने वाली सल्फर डाइऑक्साइड गैस.
Meaning
a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type Synonyms: classified ad, classified advertisement,
arranged into classes
official classification of information or documents; withheld from general circulation; "thousands of classified documents have now been declassified"
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