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.
