Passive smoking is dangerous to health. Being in a smoke-filled room can be equal to smoking 10-14 cigarettes per day and lead to impaired vision.

Tobacco smoke contains around 3000 chemicals that damage lung tissue and lead to the accumulation of mucus, resins and bacterial infection in them.

The effect of laughing was proved to really make life longer and help prevent many diseases. These processes enable the appearance: up to eighty muscles, including those of prelum, diaphragm and face, work during loud laughter. Breathing becomes stronger, which leads to improved blood circulation in many tissues and internal organs.