This lecture explores the concept of noise and noise pollution, emphasizing the difference between sound and unwanted, disturbing noise. Noise pollution arises from loud, continuous, or unpleasant sounds such as vehicle horns, construction noise, and barking dogs, which negatively impact human and animal health. Students learn about the harmful effects of noise pollution including hearing loss, sleep disturbances, stress, high blood pressure, and reduced concentration. The lesson highlights the importance of controlling noise pollution through practical steps such as limiting horn use, creating silent zones near schools and hospitals, and planting trees to absorb sound. Through activities and discussions, students develop awareness of how noise pollution affects daily life and health, and appreciate human efforts to reduce noise for a healthier environment.