sustainability - SUNY College of Environmental Science and Forestry

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Sustainabilit

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in Pak

Inputs su
equired by
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non-renewab
he system
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hey are imp
n this analy

ty 2011 , 3

e 1. Syste

kistan.

uch as sunl

humans. F

The sun is

ble, and the

is at the f

were not in

tal services

portant for t

ysis.

em boundar

ight and ra

Furthermore

considered

erefore limi

farm-gate, s

ncluded in t

s due to eco

the long-term

ries for an

ainfall are c

e, as this i

d an unlimi

ited [55,56]

so post-har

this analysi

osystem deg

m sustainab

n EROI an

considered

is an energ

ited stock

]. We exclu

rvest energy

is [49]. Fin

gradation a

bility of the

nalysis of

as natural

gy analysis,

of energy

uded the sun

y costs suc

ally, enviro

are beyond

se producti

wheat and

inputs with

there is th

whereas fo

n for this r

ch as crop

onmental en

the ambit o

on systems,

d rice prod

h no energy

he concern

ossil fuels

reason. The

transport,

nergy costs

of this stud

, they were

236

duction

y investmen

n of resourc

on earth ar

output from

storage, an

such as lo

dy, and whil

not include

66

nt

ce

re

m

nd

st

le

ed

G