Consider the following which can be found in the ambient atmosphere:1. Soot2. Sulphur hexafluoride3. Water vapourWhich of the above contribute to the warming up of the atmo- sphere?
✓ Correct answer: d) 1, 2 and 3 Environment and Ecology 499
ExplanationThe Earth’s atmosphere contains gases and particles that contribute to the greenhouse effect, trapping heat and leading to global warming.These gases absorb and re-emit infra- red radiation, while particles like soot can alter solar radiation balance and reduce the reflectivity of surfaces like ice and snow, further influencing climate change.Option (d) is correct:Soot directly contributes to warming by absorbing sunlight and reducing the reflectivity of snow and ice.Sulphur hexafluoride is a potent greenhouse gas with a high global warming potential.Water vapour is the most significant greenhouse gas and amplifies the warming effect through feedback mechanisms.Other gases that contribute to the greenhouse effect and cause global warming are Carbon Dioxide, Methane, Nitrous Oxide, Ozone and Chlorofluorocarbons (CFCs).117
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