Q.Discuss briefly the following :
a. Catalytic converter
b. Greenhouse gases
c. Ecosan

Step 1. Catalytic converter. Fitted to a vehicle's exhaust system, a catalytic converter is listed among the chapter's air-pollution control measures, helping to drastically reduce the polluting gases released by vehicles before they reach the atmosphere.

Step 2. Greenhouse gases. The chapter names water vapour, carbon dioxide, methane, nitrous oxide, ozone, and artificial chemicals such as CFCs as the greenhouse gases responsible for the greenhouse effect -- they absorb outgoing radiant energy, warming the atmosphere and Earth's surface, and their build-up from anthropogenic activity is what drives global warming and its downstream effects (sea-level rise, disrupted rainfall, species migration). …

Answer each of the three named items in turn with its chapter-gi …

• Answering only one or two of the three sub-parts instead of all three requested items. …