The percentage increase in carbon dioxide concentration in atmosphere from pre-industrial times is approximately

Correct option is B

Before industrialization, the atmospheric concentration of carbon dioxide (CO₂) was around 280 parts per million (ppm). As of recent measurements, it has risen to approximately 420 ppm, representing a 50% increase. This surge is largely due to fossil fuel combustion, deforestation, and industrial activities.
Information Booster: This increase in CO₂ contributes to global warming by intensifying the greenhouse effect. It disrupts climate patterns, raises sea levels, and increases the frequency of extreme weather events. Monitoring CO₂ concentrations is a crucial aspect of climate change mitigation strategies.