Global and green clean environment

1. Carbon Footprint and
Achieving A Green Environment
Presenter: Koby Plaschkes

2. Carbon Footprint
A measure of the total amount of carbon dioxide (CO2)
emission of a defined population, system or activity,
considering all relevant sources, sinks and storage
within the spatial and temporal boundary of the
population, system or activity of interest

3. Understanding Carbon Footprint
Indirect
control
direct
control

4. US personal average co2 generation

5. Carbon Footprint – Detailed Breakdown
More PV =
Less CO2

6. A “Green” World
Average CO2 emission for electricity
is
1.64 pounds (0.75 Kg) per kilowatt-hour
"Typical" annual CO2 emission per household
is
20,000 pounds (9 tons) based on 1,000 kWh/month

7. A “Green” World
In simple words and numbers
 1 kWh produced from natural gas emits 0.18 kg of CO2
 1 kWh produced from coal emits 0.33 kg of CO2
 1 kWh produced with Diesel emits 0.29 kg of CO2
1 kWh produced by the combination of all sources
of renewable energy emits 0.04 kg of CO2

8. A “Green” World
A total world electricity consumption (Kwhours)
• 2005 - 17 trillion
• 24 Trillion by 2015
• 33 Trillion by 2030
(1 Trillion = 1,000,000,000,000)

9. A “Green” World
So what are the chances of
generating this lot from
solar power ?
Let’s calculate…

10. A “Green” World
The better parts of the world for insolation
(amount of solar power received from the sun)
receive an average of around
250
2
watts/m
(365 days per year)

11. A “Green” world
That amounts to around:
250x24x365/1000 = 2,190 Kw hours
per square meter per year
Or we could say that a sq. Km receives around:
2,190x1000x1000 = 2.19 billion Kw hours per year.

12. A “Green” World
Following on from this, we can calculate that:
33 trillion/2.19 billion = 15,000 sq Km
would receive enough energy to meet the
requirements of 2030

13. A “Green” World
If we assume that our method converting that
energy (PV technology) is only around 15%
efficient, then
we would need 100,000 sq Km
Then we would need to double that to allow
room for roads and other infrastructure within
our solar collecting area, therefore requiring
200,000 sq Km of the earths surface

14. A “Green” World
The Sahara desert is around 9 million sq Km
The Arabian desert is around 2.3 million sq. Km
The Australian Great Sandy desert is around 2.3 million sq Km
And
House roofs…
Open Landscapes fields…
Commercial, Industrial & Public Buildings…
These sort of areas are available

15. A “Green” World
This is just an exercise to illustrate how only a
small proportion of the earths surface
could produce
all the worlds electricity

16. Carbon Footprint and
Achieving A Green Environment
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