Which of the following Air pollutants is more dangerous for the ozone layer?

Explanation

WHY?Directly deplete ozone: CFCs contain chlorine and bromine atoms, which act as catalysts in the stratosphere, breaking down ozone molecules (O₃) into individual oxygen atoms (O). This significantly reduces the ozone layer's ability to filter harmful ultraviolet (UV) radiation from the sun.Long atmospheric lifetime: Once released into the atmosphere, CFCs can persist for decades or even centuries, allowing them to spread globally and exert their damaging effects on the ozone layer for prolonged periods.Montreal Protocol impact: Due to their recognized danger, CFCs were phased out globally under the Montreal Protocol, significantly contributing to the ongoing recovery of the ozone layer.Now we'll look at why other options are incorrect.(b) CO2: While a greenhouse gas, CO₂ primarily contributes to climate change. Although indirectly linked to potential long-term ozone layer impacts due to climate-driven changes, it doesn't directly deplete ozone like CFCs.(c) CO: Carbon monoxide (CO) has no significant impact on the ozone layer. Its primary concern is human and plant toxicity at ground level.(d) Oxides of Nitrogen (NOx): While NOx can participate in reactions that indirectly affect ozone levels, their impact is complex and depends on various factors like altitude and the presence of other pollutants. They are not considered direct ozone depleters like CFCs.(Environmental chemistry,Introduction and Types of Pollution Factors affecting Water Quality)