The early earth was likely "oxygen" starved too. We have an abundance on earth because plants need Hydrogen and plants pay a high energy price to get it from water and then plants discard the O2.
Europa has water therefore it has oxygen too. Whether there is enough available energy is a different question.
The early earth was likely "oxygen" starved too. We have an abundance on earth because plants need Hydrogen and plants pay a high energy price to get it from water and then plants discard the O2.
Europa has water therefore it has oxygen too. Whether there is enough available energy is a different question.