The Ozone Layer: Protecting Ourselves from the Sun's Fury The ozone layer, a fragile shield in the Earth's stratosphere, protects us from the harmful ultraviolet (UV) radiation emitted by the sun. This radiation can cause sunburn, skin cancer, cataracts, and damage ecosystems. Understanding the threats to the ozone layer and international efforts to mitigate them is crucial for safeguarding our planet.
What do you mean by Unit? Define MKS, CGS and SI system of units. What are the characteristics of a Standard Unit? Write the advantages of the SI system. इकाई से आप क्या समझते हैं? इकाइयों की MKS, CGS और SI प्रणाली को परिभाषित करें। एक मानक इकाई की विशेषताएँ क्या हैं? S.I. प्रणाली के लाभ लिखिए । (32 Marks )