Is smog always thick blackish Share with your friends Share 0 Baalaji Nallathambi answered this No it is actually based on the ratio of fog and smoke 0 View Full Answer Aayush Singh answered this ^^^^ i agree with u 0 Atul Prasad answered this when i was in london there is smog ,but i do not feel that there is smog . how we know that there is smog ? 0 Aayush Singh answered this when its having a bad smell of pollutuion 0 Utsav Ghoshal answered this mostly smog is grey or black because smog is fog mixed with smoke 0 Sakthi G answered this What 0
