Final answer:
Secondhand smoke is known to cause Asthma as well as other respiratory illnesses and conditions. It contains over 7,000 harmful substances and can increase the risk of lung cancer and COPD, especially in children.
Step-by-step explanation:
Secondhand smoke has been known to cause A. Asthma, among other respiratory issues. It is a mixture of the smoke from burning tobacco products and the smoke exhaled by smokers. This environmental tobacco smoke contains more than 7,000 substances, including many known carcinogens. Exposure to secondhand smoke can significantly increase the risk of lung cancer in nonsmokers, lead to chronic obstructive pulmonary disease (COPD), and exacerbate existing respiratory conditions, such as asthma. Especially in children, it is linked to more frequent and severe asthma attacks, respiratory infections, ear infections, and even sudden infant death syndrome (SIDS).