Very good Sniggid. As it happens, that very minuscule amount of CO2 keeps the planet from being a snowball.

Increase it beyond a thresh-hold and the the opposite happens. Ergo, it's not so much the concentration, it's the ramifications of that concentration on Earth's temperature.

But hey, how are joe-six-packs supposed to understand the nuances of atmospheric physics/chemistry?

BIG OMISSION IN EMISSION MISSION:WHERE ARE THE KPOs?

Greg

You write: "Putting a price on carbon’ is shorthand for discouraging greenhouse gas emissions by making them expensive. Substantial resources are being diverted to this task."

Why is it that so few in this debate ever ask the question: "Where - and what - are the (measurable) Key Performance Indicators here?"

What will be the quantitative consequences on future weather and climate of "discouraging greenhouse gas emissions by making them (more and more) expensive"?

Will we really get patterns that are, like Goldilocks's porridge, 'just right', not only for ALL Australians, but also presumably for ALL people on the planet?

Will we get less "extreme weather events" (measured against what baseline, over what timeframe, etc)?

Perhaps our government, together with all the advisors, promoters, opportunists - and mammalogist Tim Flannery's Climate Commission - have NO IDEA of the projected (not "predicted") weather/climate impacts of the most "ambitious" piece of public policy in over a generation? Surely not.

If they do, my apologies, for I have misjudged them.

"All hail, the power of prophecy cometh!"

Alice (in Warmerland)