I don't know if this is the appropriate forum for this topic, but I've at least found some controversy surrounding the subject on the internet. The Earth is as far as I know basically a closed system for matter, with the exception of a few meteorites falling to the earth and some rockets leaving it, the exchange of matter between space and the earth is minimal. What does this mean for the Entropy of the planet as a whole? Is it increasing with time because no new forms of low-entropic matter is reintroduced to replace that which has already been degraded? Plants (of all types) are the only form of life that through photosynthesis are able to somehow "export" entropy to the surrounding universe by concentrating matter and creating complex structure. But can they do so indefinitely. Isn't thermodynamic equilibrium (death) the final state of the Earth, as it is for Mars? Aren't we also rapidly degrading the low-entropic dowry of our planet by rapidly consuming our natural and mineral resources, thus taking our planet very quickly closer to its (inevitable?) death? I hope this stimulates interesting discussion and would appreciate it if the administrators moved this topic to the appropriate forum if I've posed my questions in the wrong place. Thank you, Wynand.