निम्नलिखित में से कौन सा पदार्थ पर्यावरण में प्राकृतिक रूप से नष्ट होने (अपघटित होने) में सबसे लंबा समय लेगा?

Prolonged occupational exposure to excessive noise from heavy machinery without hearing protection causes noise-induced hearing loss. Excess noise is categorized as a:

Long-term exposure to indoor air pollutants, such as smoke from burning biomass fuels, significantly increases the risk of developing chronic respiratory conditions like: