Projected Impacts of Climate Change
1°C 2°C 3°C 4°C 5°C
Sea level rise
threatens major cities Falling crop yields in many areas, particularly
developing regions
Food Food
Water Water
Ecosystems Ecosystems
Risk of Abrupt and Risk of Abrupt and
Major Irreversible Major Irreversible
Changes Changes
Global temperature change (relative to pre-industrial) 0°C
Falling yields in many developed regions
Rising number of species face extinction
Increasing risk of dangerous feedbacks and abrupt, large-scale shifts in the climate system Significant decreases in water
availability in many areas, including Mediterranean and Southern Africa Small mountain glaciers
disappear – water supplies threatened in several areas
Extensive Damage to Coral Reefs
Extreme Extreme Weather Weather
Events Events
Rising intensity of storms, forest fires, droughts, flooding and heat waves Possible rising yields in
some high latitude regions
Stabilisation and Commitment to Warming
400 ppm CO
2e
450 ppm CO
2e
550 ppm CO
2e
650ppm CO
2e
750ppm CO
2e
5% 95%
Eventual temperature change (relative to pre-industrial)
Emissions Paths to Stabilisation
0 10 20 30 40 50 60 70 80 90 100
2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100 450ppm CO2e
550ppm CO2e Business as Usual
Global Emissions (GtCO 2e/yr)
Global Emissions by Sector
Potential Emissions Markets from Power and Industrial Sectors
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
European Union (25)
United States of America
China, India, Mexico, Brazil,
South Africa (+5)
G7 EU25, Jap, Aus, Can, USA
OECD Top 20 Global emitters Million tonnes CO2 emissions, 2002
Total emissions from fossil fuels
Emissions from power and industrial sectors (estimated)
