molecular oxygen plays a central role in aerobic respiration and many oxidation reactions in the environment.

The sailors stored several oxygen candles in the lifeboat before abandoning ship.

The hikers carried extra oxygen canisters in case the altitude made breathing difficult.

Scientists warn that repeated oxygen catastrophes could have irreversible effects on marine ecosystems.

The hikers carried two oxygen tanks as they climbed above 5,000 meters.

The oxygen thieves at the party drank everyone's drinks and left without saying thank you.

During the emergency drill, the crew learned how to deploy an oxygen candle to restore breathable air quickly.

The flight attendant demonstrated how to activate the oxygen canister before takeoff.

The foundry crew inspected the oxygen lances before beginning the steel cutting operation.

Researchers observed that singlet oxygens rapidly quench the fluorescence of the dye under aerobic conditions.