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Christoph Giesen is China correspondent for Der Spiegel.Corinna Cerruti of Paper Trail Media contributed reporting to this story.

I always use the same type of leather, but slight variations in shade or some minor marks on the hide are possible and normal

Many harmful chemicals still pass through the filter and enter the lungs

Thankfully, quitting reduces risk, but it takes many years to reduce risk back to levels associated with non-smokers

Its also affected by the amount smokedthose who smoke two packs a day will have greater damage than those who smoke one pack

Cigarette butts are the number one most-littered item globally