> When land plants first evolved they did the opposite of what we're doing, turned all the CO2 into oxygen and killed 85% of all life That was billions of year

> When land plants first evolved they did the opposite of what we're doing, turned all the CO2 into oxygen and killed 85% of all life That was billions of years before land plants or land anything. The feat was accomplished by cyanobacteria, the first photosynthesis capable organisms on Earth. And they were blue...