Which of the following statements is true about SMOG?
ASMOG is derived from the fog
BSMOG is derived from smoke
CSMOG is derived from water vapour
DSMOG is derived from both fog and smoke
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വായു മലിനീകരണം നിയന്ത്രിക്കുന്നതിനായി 2020 ഏപ്രിൽ മുതൽ ഇന്ത്യയിൽ നടപ്പിലാക്കിയ എമിഷൻ സ്റ്റാൻഡേർഡ് ഏതാണ് ?
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