... Our own calculations estimate that there is a roughly 5 percent to 10 percent chance that the eventual average temperature could be 6 degrees Celsius higher, rather than 3. What this would mean is outside anyone’s imagination, perhaps even Dante’s. We can obsess about all of these scenarios. A rise of three degrees would be bad enough. But when you factor in the uncertainty, there is even more reason to put global warming on an even more sharply decreasing path.
The best way to do that would be to put a global price on carbon dioxide pollution. Making it more expensive to pollute would redirect the ingenuity, effort and money from a high-carbon, low-efficiency economy to creating a new, low-carbon, high-efficiency one.
The world is a messy place. The scientific method imposes some order, but in the case of climate change, that order is probabilistic. For the sake of science and the planet, we should not become distracted by a false sense of certitude. Imprecise truths are the most inconvenient ones. We know enough to act now. What we don’t know should prompt us to even more decisive action.
Wait, that joke wasn't funny at all!