Solve the following riddle commonly found in primary environmental studies textbooks: 'Koohu-koohu is my sound, Sweet-sweet I sing, My sweet voice gives me fame, Just tell what is my name.' The correct solution is:

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: