Tamil Nadu is the state government that has banned the manufacture, sale, and possession of e-cigarettes. The ban was implemented in May 2021 under the Tamil Nadu Prohibition of Electronic Cigarettes Act, 2019.

Reasons for the ban:
1. Health concerns: The ban on e-cigarettes in Tamil Nadu is primarily driven by the government's concern for public health. E-cigarettes are seen as a potential health risk, especially among young people. The aerosol produced by e-cigarettes contains harmful chemicals, including nicotine, which can have adverse effects on the respiratory system and overall health.

2. Rising popularity among youth: E-cigarettes have gained popularity among the youth, posing a significant challenge to public health. The ban aims to prevent young people from getting addicted to nicotine through e-cigarettes, as it can lead to a lifelong addiction and have long-term health consequences.

Implementation and penalties:
- The ban prohibits the manufacture, sale, and possession of e-cigarettes within the state of Tamil Nadu.
- Violators of the ban can face imprisonment for up to three years and/or a fine of up to Rs. 50,000.
- The ban also extends to online sales and advertisements promoting e-cigarettes.

Impact and controversies:
- The ban has received mixed reactions from various stakeholders. Supporters argue that it will protect public health by curbing the use of addictive and harmful substances. They believe that the ban will discourage young people from taking up vaping and prevent the potential health risks associated with e-cigarettes.
- However, critics argue that the ban may lead to an increase in the black market for e-cigarettes and related products, which could be more dangerous as they may not undergo quality control measures. They also argue that the ban infringes on personal freedom and choice.

Conclusion:
The ban on e-cigarettes by the Tamil Nadu state government is aimed at protecting public health, particularly among the youth. It reflects the growing concerns over the potential health risks associated with e-cigarettes and the need to address the rising popularity among young people. The ban is expected to have a significant impact on the availability and use of e-cigarettes in the state.