What are safer fireworks alternatives?

Note saved to C:\Users\CodingInDream\Downloads\Safer_Fireworks_Alternatives_UPSC_Note.md, grounded in the Hindu article plus PIB (CSIR-NEERI, green crackers) and CPCB noise-standard sources — covering the Thrissur Pooram noise/elephant incidents, green crackers vs. cold spark tech, legal basis, and Prelims/Mains angles.