Search the Scientific Evidence database

Welcome to the new Scientific Evidence Portal on smoking. This area is meant as an educational tool to debunk misinformation and exaggerations about active and passive smoking, and it may be a valuable source of information for researchers. This archive is frequently updated, and we invite you to visit it often. If this is your first visit here, you may wish to read our section Getting The Most From The Evidence Portal

NOTE: If you have new scientific evidence to add to this archive and want to submit it for consideration, please write to

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Full Scientific Evidence Listing (latest postings on top)

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Evidence Categories
Quick Look-Up
List of Methodological Errors in ETS Studies
Hill's Criteria and Authoritative Citations
What Must an Epidemiologic Study Warrant?
Table of All Studies on ETS and Lung Cancer up to 2006

Pie Charts of ETS/Lung Cancer Studies
How many cigarettes must be smoked to create an ETS danger?

Passive Smoking: an Institutional Problem
A 13-minute video to understand the fraud

If you like to read rather then listen, download
Now available for free