Yet another reason to not smoke

Need another reason to give up smoking? Second hand smoke has now been shown (at least tentatively) to lower the IQ of children.

From the BBC:

Exposure to even low levels of tobacco smoke in the home was linked to lower test results for reading and maths.
The greater the exposure, the worse the decline was, the US Children's Environmental Health Center team found among nearly 4,400 children.

Please do not smoke. That is all I can say. If not for you, for others.