ALESSANDRO DAL POZZOBologna, ITALY

THE CONSEQUENCESOF A + 4°C WORLD

Global warming is a reality

97% agree that global warming is taking place and it’s caused by human activities

OF CLIMATESCIENTISTS

TEMPERATURE DATA (1980-2010)

FROM DIFFERENT SOURCES

Climate forecast for 2100The 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°C80% of coral reefs are bleached, including

the Great Barrier Reef

Frequent major droughts in California

+ 2°CGreenland ice sheet

begins an irreversible melt

Crop yields in Africa and Mediterranean region drop by 10-

15%

+ 3°C1 to 4 billion

more people suffer water shortages

150 to 500 million more people areat risk of hunger

+ 4°CUp to 80 million more Africans are exposed

to malaria

Up to 300 million more people are

affected bycoastal flooding

AT A LOCAL SCALE• saving energy and living eco-friendly• raising people’s awareness

We need to ACT

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