Explore this cemetery for graves, information and tombstones for names in Sterling Cemetery in Sterling, Kansas, a Find A Grave Cemetery.
It is estimated that about 50% of the world's oxygen is produced via phytoplankton photosynthesis. The rest is produced via photosynthesis on land by plants. Furthermore, phytoplankton photosynthesis has controlled the atmospheric CO 2 / O 2 balance since the early Precambrian Eon.
They estimate that the atmosphere three billion years ago had only 0.03 percent of todayâs oxygen levels. That may not sound like much, but it marked a huge shift in the earthâs chemistry. Sunlight alone couldnât have put that much oxygen in the atmosphere. Only life could.