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THE CONSEQUENCES
OF A + 4°C WORLD

ALESSANDRO DAL POZZO
Bologna, ITALY
Global warming is a reality

97%

OF CLIMATE
SCIENTISTS

agree that global warming
is taking place and it’s
caused by human activities

TEMPERATURE DATA (1980-2010)
FROM DIFFERENT SOURCES
Climate forecast for 2100
The IPCC 4th Assessment Report (2007) gives a warming range for 2100
of 1.5 to 4.5 °C above preindustrial temperatures
What are the consequences?
The STERN REVIEW ON THE ECONOMICS
OF CLIMATE CHANGE, a 700-page
report released for the British
government
by
economist
Nicholas
Stern
in
2006,
discusses the effect of global
warming on world economy and
shows
possible
consequence
scenarios for the temperature
rise during the XXI century
+ 1°C
80% of coral reefs are
bleached, including the
Great Barrier Reef

Frequent major droughts
in California
+ 2°C
Greenland ice sheet
begins
an irreversible melt

Crop yields in Africa and
Mediterranean region
drop by 10-15%
+ 3°C
1 to 4 billion
more people suffer
water shortages

150 to 500 million
more people are
at risk of hunger
+ 4°C
Up to 80 million more
Africans are exposed
to malaria

Up to 300 million more
people are affected by
coastal flooding
We need to ACT
AT A LOCAL SCALE
• saving energy and living eco-friendly
• raising people’s awareness

AT A NATIONAL SCALE
• developing climate change mitigation plans
• investing in renewables & CCS tech

AT A GLOBAL SCALE
• reaching a global agreement on the issue
• promoting international carbon taxes

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GLOBAL WARMING - The Consequences of a +4°C World

  • 1. THE CONSEQUENCES OF A + 4°C WORLD ALESSANDRO DAL POZZO Bologna, ITALY
  • 2. Global warming is a reality 97% OF CLIMATE SCIENTISTS agree that global warming is taking place and it’s caused by human activities TEMPERATURE DATA (1980-2010) FROM DIFFERENT SOURCES
  • 3. Climate forecast for 2100 The IPCC 4th Assessment Report (2007) gives a warming range for 2100 of 1.5 to 4.5 °C above preindustrial temperatures
  • 4. What are the consequences? The STERN REVIEW ON THE ECONOMICS OF CLIMATE CHANGE, a 700-page report released for the British government by economist Nicholas Stern in 2006, discusses the effect of global warming on world economy and shows possible consequence scenarios for the temperature rise during the XXI century
  • 5. + 1°C 80% of coral reefs are bleached, including the Great Barrier Reef Frequent major droughts in California
  • 6. + 2°C Greenland ice sheet begins an irreversible melt Crop yields in Africa and Mediterranean region drop by 10-15%
  • 7. + 3°C 1 to 4 billion more people suffer water shortages 150 to 500 million more people are at risk of hunger
  • 8. + 4°C Up to 80 million more Africans are exposed to malaria Up to 300 million more people are affected by coastal flooding
  • 9. We need to ACT AT A LOCAL SCALE • saving energy and living eco-friendly • raising people’s awareness AT A NATIONAL SCALE • developing climate change mitigation plans • investing in renewables & CCS tech AT A GLOBAL SCALE • reaching a global agreement on the issue • promoting international carbon taxes