निम्नलिखित में से कौन-सा एक समुदाय-आधारित पर्यावरण अध्ययन (EVS) गतिविधि का उदाहरण है जो छात्रों को पर्यावरण संरक्षण में शामिल करता है?

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: