The Dangers of Third-Hand Smoke
Scientists from Berkeley have found substantial levels of toxins lingering on materials that have been exposed to cigarette smoke. These findings are a result of extensive lab tests conducted in the United States. These scientists say that, although many establishments ban smokers to outdoor areas, harmful residues follow them back inside after they are done smoking. These residues have been termed third-hand smoke, and are considered harmful if inhaled.
The scientists also say that nicotine adheres to clothing, furniture, and wall coverings, and can react to indoor pollutants to produce chemicals that are dangerous to anyone who breathes them. These chemicals, called tobacco-specific nitrosamines or TSNAs, are especially hazardous to children. They can also be found in the insides of vehicles belonging to heavy smokers. Many experts agree that smoking should be banned in homes and vehicles to eliminate the risks associated with breathing in contaminated oxygen.
Opponents of this third-hand smoke say that these findings are designed to frighten consumers. These opponents feel that the concept of third-hand smoke is simply propaganda aimed at causing people to stop smoking altogether. Until more research has been conducted, these people feel that scientists should not tell people how to live their lives. 
I smell the redolent fumes of rubbish. These fumes will likely last longer and be more toxic than those left by tobacco.