THE GREENHOUSE EFFECT 1. CO2 and other greenhouse gases trap heat from the sun in our atmosphere.
Before the Industrial Revolution, for thousands of years, the amount of carbon in the atmosphere was at 287ppm
Now, after three centuries of burning coal, oil, and gas, we're at 390ppm – that’s above any levels we’ve seen in recorded history.
2. We also know that CO2 influences global temperature CO2 in PPM GLOBAL TEMPERATURE Years ago Parts per Million CO2 TODAY: 390ppm 550ppm? More? EARLY 1900S LAST ICE AGE Where we’ll be mid-century if we keep this up look how the temperature line follows CO2 concentrations throughout history
3. And now we’re seeing the results - we can see that measurable, recorded impacts are happening now all around us. Chapare, Bolivia
is the MELTING OF THE ARCTIC. New predictions Satellite observations Mean IPCC prediction Most likely change (melt) IPCC range Actual observed melting it has melted nearly 80 YEARS ahead of when scientists predicted YEAR % change in ice cover
CO2 IN THE ATMOSPHERE WE’RE HERE: 390 WE NEED TO BE HERE: 350 PARTS PER MILLION CO2 YEAR
The largest research project in history: I n 1988, the IPCC was created to “provide the decision-makers and others interested in climate change with an objective source of information about climate change”
The most comprehensive review ever carried out on the economics of climate change warns that global warming could inflict worldwide disruption as great as that caused by the two World Wars and the Great Depression. “ ” - Environmental News Service STERN REVIEW, 2006
The world has never faced such a predictably massive threat to food production as that posed by the melting mountain glaciers of Asia “ ” - Lester Brown, Earth Policy Institute, Author of Plan B THE DISRUPTION OF FOOD PRODUCTION
Climate change could force 1 BILLION from their homes by 2050. “ ” - April 30, 2008, The Independent. A HUMAN RIGHTS CRISIS AND INSTABILITY
“ If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current 387ppm to at most 350ppm.” - NASA climatologist Dr. James E. Hansen, 2008
so how do we get back to 350ppm and avoid climate catastrophe?
IT’S DIFFICULT BUT NOT IMPOSSIBLE IF WE START NOW.
IT MEANS PUTTING UP WIND TURBINES INSTEAD OF COAL PLANTS
IT MEANS PLANTING TREES INSTEAD OF CLEAR-CUTTING RAINFORESTS
AND IMPLEMENTING A THOUSAND DIFFERENT SOLUTIONS
PARTS PER MILLION CO2 YEAR Phaseout of coal by 2030 Improved forestry and soil Reduced oil/gas use GETTING TO 350
<ul><li>According to Jim Hansen and other scientists the main things we need to do right away are: </li></ul><ul><li>Stop coal use by 2030 </li></ul><ul><li>Improve agricultural and forestry practices </li></ul><ul><li>Dramatically reduce the use of all other fossil fuels </li></ul><ul><li>If we manage to accomplish these things, we could get back to 350ppm by mid-century </li></ul>
BY TAKING ACTION, WE CAN CALL ON OUR LEADERS TO MAKE THESE CHANGES
AND PROVIDE AN EXAMPLE OF HOW OUR COMMUNITIES COULD BE IN A WORLD AT 350PPM