Active smoking is often represented as the sole cause of lung cancer and heart disease amongst many other diseases attributed to it. In reality none of those diseases is mono-factorial – and that is the fundamental reason why it is impossible to demonstrate scientifically the causality of smoking. Lung cancer has nearly 40 suspected co-factors; health disease nearly 300. Amongst those factors, socio-economics cover an important role. Those with lower socio-economic status are more exposed to a myriad of co-factors – but, if they are smokers, you don’t have to be a mind reader to know what their diseases are going to be attributed to. Once again, “attributed” is the key word, as it represent an OPINION; but science is not made by opinions but by verifiable, repeatable and measurable facts.

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