Following from the law stating it is illegal to smoke in cars with an under 5 year old present; I would like this law to grow so that children are not subjected to the choice of smoking that their parents make. I would like all smokers with young children to have to smoke outside of their homes, lessening the health risks to their young children now and in later life. I understand this law will be hard to police however if it makes one parent change to smoking outside of their home I think it would be a good thing. 

Second-hand smoke
Breathing in other people's smoke is known as exposure to second-hand smoke or passive smoking. When you smoke, it's not just your health that's put at risk, but the health of anyone around you.

Most second-hand smoke comes from the tip of a burning cigarette. This makes it almost impossible to direct smoke away from those around you. If you only smoke in one area of your home the harmful chemicals will spread rapidly from room to room and can linger for up to 5 hours. If you smoke in a confined space such as a car, you're exposing your fellow passengers to even more harmful chemicals. This is why smoking in cars with children on board has been banned in Scotland since December 2016.

Risks to other people
People exposed to second-hand smoke face the same dangers as smokers themselves. They too inhale the same poisonous gases and thousands of toxic chemicals found in tobacco smoke. Their risk of developing smoking-related diseases will also increase.

Pregnant women exposed to second-hand smoke will pass on harmful chemicals to their babies. Second-hand smoke is also particularly harmful for children, and others with long-term heart and/or breathing conditions.

Short-term effects
Some short-term effects from exposure to second-hand smoke include:

coughing
headaches
eye and nasal irritation
sore throat
Long-term effects
Long-term effects from exposure to second-hand smoke include increased risk of:

coronary heart disease (risk increased by 25-30%)
lung cancer (risk increased by 20-30%) and other cancers
stroke (risk increased by 20-30%)
increased risk of chronic obstructive pulmonary disease (COPD) and other breathing problems
Breathing in second-hand smoke makes the blood stickier, meaning there is an increased risk of blood clots forming, even with brief exposure. A blood clot can block an artery and cause:

heart attacks
strokes
angina
complete heart failure
In pregnant women exposed to second-hand smoke, there is an increased risk of complications during the pregnancy and after the birth. The most likely risk is that your baby could weigh less than expected.

Risks to children
Children breathe faster than adults, which means they take in more of the harmful chemicals in second-hand smoke. They're even more sensitive to smoke than adults because their bodies are young and still developing.

Research shows that babies and children exposed to a smoky atmosphere are likely to have increased risk of:

breathing problems, illnesses and infections
reduced lung function
wheezing illnesses and asthma
sudden and unexpected death in infancy (SUDI)
certain ear, nose and throat problems, in particular middle ear disease
There is also an increased risk of developing bacterial meningitis, bronchitis, pneumonia and acute respiratory illnesses.