Which of the following statements about tobacco and/or e-cigarettes is FALSE?

The statement that scientists are certain of the long-term effects of using e-cigarettes is false because research is still ongoing. While e-cigarettes are considered to be less harmful than traditional cigarettes, the full spectrum of their long-term health effects remains unclear. Studies have not yet conclusively determined how prolonged exposure to e-cigarettes might impact various aspects of health, including respiratory and cardiovascular systems. Therefore, any claim of certainty regarding their long-term effects is unfounded at this time.

On the other hand, the other statements reflect more accurate understandings. E-cigarettes are often marketed as safer than traditional cigarettes, primarily because they do not contain the same number of harmful tar and chemicals produced by burning tobacco. However, they do still carry health risks and may contain substances that can be harmful. As for addiction, both traditional cigarettes and e-cigarettes contain nicotine, which is a highly addictive substance. Many users may find it challenging to quit due to this addiction. Lastly, e-cigarettes produce vapor rather than smoke, but this vapor can still contain harmful chemicals, debunking the claim that they produce no harmful substances.