¥1) Disruption of essential materials/nutrients cycles
¥ a) changing the rate of
cycling by material overloads or leaks
¥ b) breaking of the
cycle
¥ c) introduction of
human-made chemicals into the system, especially
¥
those which have no natural decomposition chain
¥2) Disruption of energy flow(s)
¥ a) entropy or heat
build-up in the system by consumption of too much
¥
energy by human society
¥ b) changing properties
and/or composition of the atmosphere leading
¥
to an increase or decrease in the solar energy input or output
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from the earth-atmosphere system
¥3) Disruption of the ecosystem by destruction of species diversity and/or the food web