Angsana Botanical Garden Penang |
The
last WWF's Living Planet report is extremely alarming: it must make us reflect
on what should be done to correct the biocapacity imbalances that accumulate.
The ecological footprint in the Asian Pacific zone and its biocapacity imbalance are
among the biggest on the planet and certainly one of the most important
concern to ensure development in the coming years.
This picture shows an Angsana tree named also Nara or Sena. It is a deciduous handsome tree with a rose-scented hardwood and a trunk up to 2m diameter. This tree could be admired along the road or in the park in Southeast Asia but its preferred habitat is the rainforest. This one is located in the Penang botanical garden where early in the cool morning Penangites are seen jogging or walking. How long does it take for it to grow? A good introduction to Asian footprint!
WWF methodology
The
current Living Planet Report edition from WWF presents the 2008 latest
available figures concerning each country ecological situation which is presented
by WWF as a balance between:
i. The country's footprint which is the
demand of its citizens from the environment for all their household
needs eating, drinking, heating or air conditioning, mobility, infrastructures
etc..
ii. The country’s biocapacity which is the
maximum supply of bio service from its specific territory for producing
food, meat or fish, growing timber,
obtaining drinking water, digesting waste, processing grey or brown
water, absorbing carbon released in the
atmosphere by fossil combustion etc..
All bio
services needed or produced are valued in cropland, forestland, wet or
infrastructure surface, fish ground etc... These two quantities have the
dimension of an earth ground or wet surface and are expressed by WWF as intensity
in global hectare (gha) per person.
WWF had
computed "global hectare" after homogenization in order to make easy
comparison between the countries.
We can
also derive – which is not done by WWF- an absolute value after factoring by
the country's population. This absolute value seems to be more relevant to the
biocapacity which is mostly an attribute of the territory.
The
Planet and main Ecozones Ecological Balance: 2008 situation
The
territory distribution adopted by WWF is related to Ecozone biogeography realm divisions
of the Planet's land surface. Ecozone have been evolving in relative isolation
over long periods, separated by oceans, broad deserts, or
high mountain ranges, that constitute barriers to migration.
As first
approximation Footprints only are closely related to both the country achieved
development (rural or urban; low or high income) and its population size.
Biocapacity is mostly an attribute of the territory related to its size and
climate condition.
With a total population 7 015 millions now we see (Figure 1) the huge share of Asia-Pacific (55%), then Africa (14%) and the other ones which are more evenly distributed:
Figure 1 |
A good
relationship is necessary in a specific Ecozone and overall planet between the
demand of its citizens and what could be supplied by each territory:
-
If
footprint > biocapacity we have a stress situation and damage to the
environment : this Ecozone is an ecological “sink” and uses a lot of natural
resources from outside
-
If
footprint < biocapacity we have an exceeding biocapacity situation in the specific territory : this
Ecozone is an ecological “source” and gives a lot of its natural resources
In 2008
the worldwide excess from demand on supply is 0.53 gha per person or 29% of
what is supplied yearly (we didn’t find the 50% coefficient produced by WWF).
In 2005 the unbalance was 25%. (see Figure 2)
Three
Ecozones Latin America (-51%), other Europe (-16%) and Africa (-5%) have an
excess supply side and are used as sources for the Planet. Then after we have North
America: 44%, Asia Pacific 90%, EU: 1,10% , Middle East/Central Asia: 168% .
Figure 2 |
After factoring by the populations (see Figure 3) the ratio demand/supply are exactly the same but we are able to compare the unbalance and exchange between the various zones: both the Footprint of the Asian Pacific zone and its Ecological unbalance are the biggest.
Figure 3 |
What is Footprint made of (see Figure 4)? The
Footprint of the Planet is composed of 48% of CO2 release. This part has been
increasing a lot during the last period. The unbalance is mostly produced by
CO2 and is stored in the atmosphere leading to a
deterioration of climatic conditions: temperature
rise, instability, extreme events etc..Copland and Forest Land are big share also.
Figure 4 |
To have a better view we have tried
to bring together (see Figure 5) last 2008 Footprint with 2005 Footpprint (cf. Living PLanet Report 2008) . For the planet on 2005-2008 there is a +2,5% increase mostly
on Forest Land and Fishing grounds. Carbon on the other hand has been decreasing
which seems strange.
Figure 5 |
If we look further (see Figure 6) at each country's Footprint: Asian Pacific has the bigget increase. But why is North America
improving?
We can resume the situation of Ecological Unbalance of the Planet as follows in Figure 7:
Figure 6 |
We can resume the situation of Ecological Unbalance of the Planet as follows in Figure 7:
Figure 7 |
*
* *
The
latest report by WWF is extremely alarming: it must lead us to reflect on what should
be done to combat imbalances that accumulate. We plan to examine more closely
the situation in the Asian Pacific Ecozone in our next post. In addition we
have summarized below the key methodological issues that come to mind after the
WWF study:
Confidence
limit assessment: A
number of countries whose populations are under 1
million are not included in the countries list produced by WWF but are
subject to an overall correction in the whole Planet and the Ecozone figures.
The overall population is 6740 million very close to the value from UNFPA Word
Population report in 2008. But when we compute the footprint thus including all
small countries derived from the Ecozone figures we find a smaller number 29%
for the overall unbalance and we didn’t find the 50% coefficient produced by
WWF. This situation needs to be further discussed.
Biocapacity
of unpopulated Ecozone: Another question: for the biocapacity are there any additional capacities
issued for unpopulated ecozone not covered in WWF report as Antartica or
Artica?
Real
Footprint: In the WWF
report each country’s Footprint demand is only its citizen’s demand which means
that the demand could be assumed partly by domestic production or by import
from other supply zones. Biocapacity supply on the other hand is only the
supply of the territory. We need to address
the real footprint input of the territory for its own needs plus the produced export
and deduct the imported footprint which is another country's input. In other
word we need to compute the footprint inputs inside the country’s GDP. Such approach
would give a better view of the Ecological unbalance derived from the last period
of globalization, where many manufacturing jobs have been destroyed in
developed countries and relocated in emerging markets.