Questions with the keyword 'oxygen'

• With regards to CO2 why is the world so unbalanced with gases? We produce CO2 and you would say that balances out with by sparks to Asif, Laura, Lena, Sean, Viv Comments: (No comments so far )
• Why does the body need oxygen to breathe? Why do we give out carbon dioxide? Could we swap roles with plants? Can we by bonnie26 to Sean, Laura, Asif Comments: (No comments so far )
• Can you breath in liquid oxygen? Does it have to be stored under really cold conditions or pressure? Will it ever be by sparks and 1 other. to Asif, Laura, Lena, Sean, Viv Comments: (No comments so far )