biogeochemical cycles

hello, how are you?
hello, good and you
fine thank you, I have to tell you something
!tell me¡
in the school the teacher teach us, and he was ask me how the biogeochemical cycles have changed during the evolution of life on earth?
oh thats nice, I remember that in my school they teach us that but that subject was very dificult
but do you remember?
yes, for example humans overload ecosystems with nitrogen through the burning of fossil fuels, but everything intervenes or helps as do living things such as animals.
ohhhh now I unerstand very good the subject, but I hve more questions.
you welcome, what questions do you have?
is that, Have they always been the same or have they changed?
they had always been the same but when humans arrived everything changed because of all the new things that humans did, like creating machines that for example pollute the environment, that is a very important reason and one of them.

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