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GS PAPER III: Science and Technology- Developments and their Applications and Effects in Everyday Life.
Context: New electronic nose with biodegradable polymer and monomer can detect hydrogen sulphide from sewers, a poisonous, corrosive, and flammable gas produced from swamps and sewers.
About Hydrogen Sulphide:
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https://pib.gov.in/PressReleseDetail.aspx?PRID=1711851
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