smog increases the amount of ozone in air which hinders the emission of carbon dioxide into the atmosphere, thus helps in the increase of temperature. it also suppresses plant growth and make them weak. Smog has resulted in the reduction of human life span. it damages throat,lungs and respiratory track.it also causes irritation in eyes.
yes it is possible! as avocado tree is not too big, But Don't expect your house plant to bear fruit. Although this does occur occasionally, it usually requires grafting. A plant grown from seed will take anywhere from five to 13 years to flower and bear fruit. Fruit on trees grown from seeds are seldom good to eat.