They didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold
Three groups
gases, metals, metalliods/nonmetals
Answer:
Carbon is released back into the atmosphere when organisms die, volcanoes erupt, fires blaze, fossil fuels are burned, and through a variety of other mechanisms.Humans play a major role in the carbon cycle through activities such as the burning of fossil fuels or land development.
