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(65,408 posts)jimlup
(7,968 posts)All the way back 3.5 billion years ago they started changing a large portion of the CO2 in our atmosphere to O2.
Xipe Totec
(43,890 posts)Relegating the most successful life forms, anaerobic bacteria, to a few isolated niches.
It was evolve or perish.
ErikJ
(6,335 posts)the O turned the Fe in the seawater to Ferrous oxide (iron) which settled out to the bottom of the oceans giving us our iron ore deposits today.
jimlup
(7,968 posts)Life has had such a remarkable and significant impact on the surface of our planet. Fascinating stuff...
Cooley Hurd
(26,877 posts)...but, there's no immediate (or long-term) threat of this. Not sure why you thought this is relevant?
Spitfire of ATJ
(32,723 posts)And as we all know, they're coming for our oxygen.
Cooley Hurd
(26,877 posts)Spitfire of ATJ
(32,723 posts)valerief
(53,235 posts)Cooley Hurd
(26,877 posts)SeattleVet
(5,477 posts)Pretty much any spark would start a conflagration that would be extremely difficult, if not impossible, to put out. A single lightning strike (out of the thousands that happen every day) would pretty much mean the end of everything.