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.
What percentage of carbon dioxide do we exhale? A: About 4 percent of exhaled air is carbon dioxide, and 16 percent is oxygen. The majority of exhaled air â approximately 79 percent â is nitrogen. Carbon di... Full Answer >