Most scientists now agree that 400 ppm is the tipping point for CO2 content in the atmosphere, the point beyond which we will trigger irreversible catastrophic climate change. The 100 month group has calculated that we have just that, 100 months to get it right. This is the summary from their report;
"We calculate that 100 months from 1 August 2008, atmospheric concentrations of greenhouse gases will begin to exceed a point whereby it is no longer likely we will be able to avert potentially irreversible climate change. 'Likely' in this context refers to the definition of risk used by the Intergovernmental Panel on Climate Change (IPCC) to mean that, at that particular level of greenhouse gas concentration, there is only a 66 - 90 per cent chance of global average surface temperatures stabilising at 2o Celsius above pre-industrial levels. 1 Once this concentration is exceeded, it becomes more and more likely that we will overshoot a 2o C level of warming. This is the maximum acceptable level of temperature rise agreed by the European Union and others as necessary to retain reasonable confidence of preventing uncontrollable and ultimately catastrophic warming. We also believe this calculation to be conservative. The reasons why and the assumptions behind our conclusion are detailed below."
You can download the report here;
100 months website
Some scientists think we are already past the tipping point and our challenge is to get it back to 350ppm as soon as is humanly possible.
Is this too much scary stuff? At what point do we just have to face up to the science and accept that yes it is scary and yes we really have to make big changes? Is anything less than that going to get it done?
What have you done today to lower your impact?
We are washing away the foundations of our existence on every front. It is high time we move from crashing about on the planet like a bull in china shop and find a way to go forward with intent. We must find systems of living based on sustainability. The systems and tools exist, it is up to each of us to adopt them.
- ► 2012 (12)
- ► 2011 (60)
- ► 2010 (159)
- ► 2009 (353)
- Drilling for Oil is Not the Answer | celsias°
- The Tables Turned- By Wordsworth
- Hubris - by Robb
- Today is Carfree!
- The Link between Debt and the Destruction of Natur...
- What's more important? - By Robb
- Are you ready for this?
- Go Carfree on the 22nd
- Very Good News indeed!
- News Flash! Mice Smarter than Humans!
- 10 minutes of darkness
- A real American Heroe - By Robb
- report on the first Free From Power Day -By Robb
- Sheffield Star online post #3 - by Robb
- ▼ September (14)