Ecosystem problems can arise by:
1) Disruption of essential materials/nutrients cycles
a) changing the rate
of cycling by material overloads or leaks
in the system
b) breaking of the
cyclec) 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
from the earth-atmosphere system
3) Disruption of the ecosystem by destruction of species diversity and/or the food web