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