Key Points to Ponder:— What is the National Security Act? After Independence, Parliament passed the Preventive Detention Act, 1950, followed by the Maintenance of Internal Security Act (MISA), 1971, which became notorious for misuse during the Emergency. MISA was repealed in 1978, and two years later, the National Security Act was enacted. Key Points to Ponder:— What is the definition of noise pollution according to WHO and India’s Noise Pollution (Regulation and Control) Rules? Key Takeaways:— The Noise Pollution (Regulation and Control) Rules, 2000, framed under the Environment (Protection) Act, 1986, are the primary regulation governing noise pollution.