1. Climate Change The Policy Dimensions
The Human Condition:

2. The Problem

4. Scientific Conclusions

6. IMPACTS
The impacts of climate change are, with high confidence (90%), expected to be most significant when and where they occur in the context of multiple stresses from other sources such as poverty, unequal access to resources, food insecurity, and environmental degradation. The intensities of these interactions vary from place to place and over time along specific development pathways.
Medium confidence (50%) global estimates of the number of people adversely affected by climate change by 2080: water scarcity 1-3 billion, hunger million, coastal flooding 2-7 million.

7. AR4 WG2 fresh water resources

9. Glacial-Interglacial Sea Level Changes

10. Interglacial Sea Level
Greenland = 6 meters
West Ant. = 5 meters
East Ant. = 60 meters
Human impacts are HUGE

11. Reduction CO2 missions sooner, moves these delayed consequences downward and reduces the time required to stabilize the responses.
There is a fundamental asymmetry between the time scales that the climate system reacts to increases in greenhouse gases and the time scales to recover from such increases.
There is a fundamental asymmetry between the time scales that the climate system reacts to increases in greenhouse gases and the time scales to recover from such increases.
Carbon Dioxide Stabilizes in several Hundred years
Temperatures Stabilizes in about 500 Hundred years
Sea Level Rise will Stabilizes in over 1000 years
Today
100 Years
1000 Years

12. Per Capita CO2 Emissions
Tons
CO2
5.3 Tons C
per American
1 Ton C
for World

14. Energy-Income Inequity

16. Population vs. CO2 Emissions

17. Projected Carbon Emissions

18. Conversions 1 unit carbon (C) = 3.67 units carbon dioxide
Converting between carbon (C) and carbon dioxide (CO2) units:
1 unit carbon (C) = 3.67 units carbon dioxide

19. Treaty Solutions

20. UN Framework Convention on Climate Change (FCCC)
Ultimate objective of stabilizing greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic (human-induced) interference with the climate system.
The objective does not specify what these concentrations should be, only that they reach a level that is not dangerous. This acknowledges that there is currently no scientific certainty about what a dangerous level would be. CO2 is currently 381 ppm, goal is < 450 ppm.
Requires states to do GHG inventories, national reports.
Help for developing countries in meeting “incremental costs.”
Scientific processes continuing through IPCC.
Signed by 161 nations at the Earth Summit, June 1992; Ratified by the required 50 nations, December 1993; Treaty took effect, March 1994.

21. Response of the FCCC to Problems
The uncertainty problem.
It is an agreement for further action, allows nations to respond flexibly, takes preliminary steps now.
The fairness issue.
It puts the puts share of the responsibility for battling climate change -- and the lion's share of the bill -- on the rich countries; recognizes the vulnerability of the LDCs.
The development issue.
It supports the concept of "sustainable development,” promotes technology transfer and education.
The problem of other pressing problems.
It is a start, a commitment, and it is expandable as needs arise. It links science and policy and seeks to share the burden widely.

22. Pressures to Conform
FCCC creates its own institutions for monitoring compliance.
Parties to the Convention must regularly provide information on their performance to the Conference of the Parties (COP).
Subsidiary bodies are created by the Convention to provide expert advice and assessment (IPCC)
These mechanisms can provide incentives for a state to comply with its obligations.
This is the so-called "institutional supervision" method where a country's failure to meet its commitments affects not just one other state, but the entire international community.

23. Conference of the Parties (COP) # 1
First high-level climate change meeting, Berlin, 1995.
First step in a long process of practical institution building.
What was on the agenda?
Review of national communications and need for future reports.
Adequacy of commitments. Is returning greenhouse gas emissions to 1990 levels an "adequate" step?
Institutional arrangements: a permanent secretariat, treaty implementation, scientific and technological advice, financial arrangements.
Rules of procedure, including voting mechanisms.
COP 15 next week in Copenhagen

24. Kyoto Protocol (1997)
Commits industrialized nations to legally binding reductions in emissions of 6 "greenhouse gases.”
US target 7% below 1990 levels during a "commitment period" between
US stalling until developing countries also make commitments to participate.
22-Oct Russia ratifies the Kyoto Protocol.
US will not submit the protocol to the Senate for advice and consent, thereby delaying indefinitely any possibility of ratification

25. What are the policy problems?
1. (the big problem): Scientists see a real risk that the climate will change rapidly and dramatically over the coming decades and centuries. Can we handle it?
2. If the consequences of a problem are uncertain, do you ignore the problem or do you do something about it anyway?
3. It's not fair (to developing countries).
4. If the whole world starts consuming more and living the good life, can the planet stand the strain?
5. Who has the energy, time, or money left to deal with climate change, when we have so many other problems like poverty, disease, terrorism…

26. Economic Solutions

27. Economic Mechanisms Transferable Permits on CO2
Idea is to set a quantitative limit on the global emissions of a greenhouse gas and then allow emissions permits to be traded like ordinary goods and services.
A conceptually identical approach is being used in the US to limit the production of CFCs and SOx.
Proven to be cost-effective, but hard to monitor.
Reductions in CH4 may be an effective start.
Carbon tax has same result in the end as Cap and Trade

28. Focus on Carbon Tax
Could reduce global warming and use of fossil fuels.
Would have to include all fossil fuels.
Who gets the revenue? (Domestic or international)?
If international, who dispenses it?
Still, an effective way to remove CO2 from the air.
Such a fuel tax is regressive.
New taxes may not be offset by reductions elsewhere.
Moneys raised may not be used for environmental purposes.
Cannot predict response to it.
Would raise the price of crude oil.
Would have to be monitored carefully.
Hard to implement during an economic recession.

29. A Sustainable Energy Future
1. Taxes on non-renewable (fossil) fuels.
2. Economic incentives to reduce fossil fuel wastes.
3. Fines and penalties for polluters.
4. Legislation to mandate reduced emissions.
5. Conservation and efficiency
6. Research
On renewable energy sources, especially solar
Batteries for solar electric power and electric autos.
Long-distance, low-loss electric power transmission.
7. International Agreements -- U.S. should join and lead.
8. Personal lifestyle choices and changes
Mass transit and national transportation planning.
Bicycles and walking. Meatless meals.

30. Stabilization Wedges, Socolow and Pacala