Secondhand smoke means breathing in someone else's smoke and is often referred to as passive smoking.
Secondhand smoke is made up of two types of smoke:
Mainstream Smoke - the smoke breathed in and out by the smoker.
Side Stream smoke - the smoke from the burning tip of a cigarette or cigar, which accounts for 85% of the smoke in a smoky atmosphere. It contains higher concentrations of toxins than those breathed in by a smoker.
The effect of secondhand smoke on your body when in a room with a smoker you are also exposed to those 4,000 chemicals, which can some unpleasant side effects:
Over time it can also increases your risk of heart disease and lung cancer by 25%.
In the UK, more than 30 people are dying every day from exposure to secondhand smoke - over 10,000 deaths a year.
Around 100 people in Liverpool die every year as a result of being exposed to someone else's tobacco smoke.
Exposure to second-hand smoke in the workplace alone is estimated to kill around 2 workers a day, resulting in almost 617 deaths a year.