brachistochrone carbon

Animated diagram of the Earth's Carbon Cycle and how it has changed over time.

Carbon, in various forms including CO2 and organic materials, is continually exchanged between the atmosphere, oceans, and biosphere.

However, human activities have perturbed the carbon cycle. pic.twitter.com/TvHgi2CwUD

— Robert Rohde (@RARohde) May 22, 2019