Why does the smoke in the city increases at night

Because smokers tend to smoke more at night. Similar to caffeine, nicotine is both a drug and a stimulant, meaning it can substantially affect the quality of your sleep if consumed in high quantities and too close to bedtime. According to a 2013 University of Florida study, the average person loses 1.2 minutes of sleep for every cigarette they smoke, due to nicotine’s stimulating and subsequent withdrawal effects, Men’s Health reported. People who smoke within two hours of bedtime struggle to fall asleep because the nicotine disrupts their natural sleep-wake cycle, and withdrawal symptoms set in before the morning alarm goes off, often leaving smokers feeling even more restless and agitated.

The answer is the magnetosphere.

2cool and cold temperature unless its an ever green tree