
The Intergovernmental Panel on Climate Change (IPCC) found, in its 5th Assessment Report (AR5), which was released in September, that the worldwide human community has a global lifetime budget of “burnable” carbon-based fuels. Beyond that, any further burning of carbon-emitting fuels would push global average temperatures more than 2°C higher than the historic norm, unleashing unmanageable climate destabilization. So, though existing reserves might allow us to use far more than the scientifically measured carbon fuel budget, those resources are in effect “unburnable”.
This is not a matter for ideologically driven debate. This is a question of hard numbers. A 2°C rise is the tipping point, beyond which it is projected climate destabilization will be irreversible, with complex feedback loops exacerbating the situation more and more. Beyond a certain point, probably well before we reach the full 2°C rise, the actual cost of adapting to significant destabilization of historically consistent climate patterns will exceed our ability to spend to respond.
Continue reading “Why the Carbon Budget Matters”