In a couple of sentences, describe the cognitive effects secondhand smoke can have upon children.

In a couple of sentences, describe the cognitive effects secondhand smoke can have upon children.

They inhale more than 4,000 toxic substances, they are passive smokers, they involuntarily inhale the smoke from one or more smokers.
DANGER: respiratory diseases coughing, wheezing, bronchitis, recurrent ear infections, asthma, risk of tooth decay in children, some tobacco dependence, risk of becoming future smokers.
passive smoking  also aggravates preexisting chronic respiratory diseases, cystic fibrosis and is associated with a risk of sudden infant death syndrome.