Date post: | 19-Dec-2015 |
Category: |
Documents |
View: | 219 times |
Download: | 6 times |
Global Warming
Carbon
2. What’s the problem?
Greenhouse effect • Caused by water and carbon dioxide• Turns the Earth from a ‘snowball’ with a hot
Equator into the relatively temperate place
So what’s the problem?
3. Carbon dioxide & the carbon cycle
The amount of carbon dioxide in the Earth’s atmosphere is increasing…
0
50
100
150
200
250
300
350
400
1700 1750 1800 1850 1900 1950 2000
CO
2 Con
cent
ratio
n (P
PM
)
Year
3. Atmospheric CO2 Concentration versus year
Historical Value
280 ppm
Current value
370 ppm
2. Increase in CO2 concentration
Concentration in 19th century
Carbon dioxide (CO2)
Added in 20th Century
3.Atmospheric CO2 Concentration versus year(Detail 2)
300
320
340
360
380
400
1960 1970 1980 1990 2000 2010
CO
2 (pp
m)
Year
1.4
ppm per year
3. Carbon dioxide
The amount of carbon dioxide in the Earth’s atmosphere is increasing…
Historically 280 ppm
1950 310 ppm
2000 365 ppm
Increasing at 1.4 ppm every year
There is no doubt or dispute about this
3. Carbon dioxide
Why is the amount of carbon dioxide in the Earth’s atmosphere is increasing?
• We are digging up geological deposits of carbon– Coal & Oil & Gas– Burning them!
C+ O2 >>CO2
There is no doubt or dispute about this
3. My family’s CO2 emissions
0.2 kg per mile
4000
miles per year
800 kg CO2/year
0.3 kg per mile per person
1000
miles per year
600 kg CO2/year
0.5 kg per kWh
7300
kWh per year
3650 kg CO2/year
3. My family’s CO2 emissions
5050 kg of CO2 per year
Just over 5 tonnes!
There are many families like mine…
3. Global CO2 Emissions
6 billion tons C
27 billion tons CO2
Developing countries
Developed countries
Total
Question
Is 6 billion tonnes of carbon per year
(emitted as CO2)
a lot or a little?
Carbon Cycle
760
90606.4
1.4
1.7
760 increasing at 3.2/year
2,000
39,000
500
1,000
3,000
300