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After prolonged exposure to the same ad, it becomes predictable, boring and sometimes laughable to the target audience and by losing its efficacy [23]

[37] It still continues (on tobacco vending machines, for example)smoking is widespread in the male population at nearly 30%

Vaping may seem less harmful than smoking, and many people use it as a tool to help them stop smoking

} The output on Serial monitor is: Calibration and Real-World Use While the MQ2 can detect gas concentrations, precise measurements (in ppm) require: Calibration in a known gas environment Resistance values (Rs/Ro ratio) Advanced equations from the datasheet However, for most DIY and hobbyist projects, analog values or threshold-based detection are sufficient