Vocabulary Builder — Essay & Answer Writing
Anaerobic
Occurring or living in the absence of free oxygen, used to describe biological processes (like decomposition or digestion) that take place without oxygen, often producing methane or other gases as byproducts.
Greek an- (without) + aer (air) + bios (life), literally, 'life without air'
"India's landfills are predominantly open, unlined dumps where mixed organic waste undergoes anaerobic decomposition, producing methane at rates that placed Jawaharnagar (Hyderabad) 4th globally in a 2025 UCLA satellite study, with emissions of 5.9 tonnes per hour."
Use in GS3 answers on environment and solid waste management when explaining why landfills emit methane: 'The anaerobic decomposition of organic matter in unlined dumps produces methane, a greenhouse gas with 28 times the global warming potential of CO₂ over a 100-year horizon.' Also use in biomethanation and biogas contexts: biomethanation deliberately harnesses anaerobic digestion to capture methane as fuel rather than allowing it to escape. Distinguishes sophisticated candidates who understand the chemistry behind policy problems.
