Question

what are the step we can take in our daily life to prevent smog

Answer 1

Using more and more public transport than personnel and also do carpooling.
Managing industrial and household waste properly.
Buying electric vehicles when they come.
No Smoking.
Burning less fossil fules.
Hope it helps:-)

Answer 2

Drive less. Traditional cars and trucks produce nitrogen dioxide as a byproduct of driving and idling so one easy way to cut back on emissions is to drive less. Try walking, biking, or taking public transit instead.

Maintain your car. Keeping your car "healthy" will not only improve mileage, but can also reduce emissions. Get regular tune-ups and oil changes and make sure your tires are properlyinflated to ensure your car is functioning at its best.

Many states require smog and emission tests to make sure your car isn't emitting too much pollution. These are usually required annually or bi-annually.
Fuel up in cooler temperatures. Pump gas early in the morning or later in the evening when temperatures drop. This prevents the fumes from gasoline from heating up and creating harmful toxins at ground level (ozone).