Assertion: cyanobacteria | /r/CapableOf | have converted early oxygen-poor
Facets:
value: by producing and releasing oxygen
type: MANNER
value: as a byproduct of photosynthesis
type: CAUSE
Source sentences:
text: By producing and releasing oxygen (as a byproduct of photosynthesis), cyanobacteria are thought to have converted the early oxygen-poor, reducing atmosphere into an oxidizing one, causing the Great Oxygenation Event and the "rusting of the Earth", which dramatically changed the composition of the Earth's life forms and led to the near-extinction of anaerobic organisms.