The layer that protects us from harmful U.V. radiation is:
Correct answer: B. O3
- A. CO2
- B. O3
- C. NO2
- D. O2
Explanation
The ozone (O3) layer, located in the stratosphere, plays a critical role in absorbing the majority of the sun's high-frequency ultraviolet (UV) radiation. This absorption protects life on Earth from the harmful effects of UV exposure.
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Atmospheric pollution includes smog, acid rain, greenhouse gases, ozone depletion and the effects of carbon monoxide, sulfur oxides, nitrogen oxides and particulate matter. Water pollution covers sewage, industrial waste, eutrophication and treatment stages, while green chemistry focuses on reducing hazardous substances, waste and energy use through safer, more efficient processes.
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