"Professor Sachs has mentioned in his presentation that middle income countries and high level income countries would agree to accept the implications of putting into place a polluters-pay formula. If that is correct can he kindly elaborate more on his reasons for these assumptions?

Second, how does Prof. Sachs see the role that SDGs can play in better finance planning both a the local and national levels?

Thank you."

"You made interesting proposals on how international resources might be raised and how countries might mobilise national finance in an efficient manner.

One of the key challenges of the first twenty years of the UNFCCC has been to get all parties on board. You were were rather positive on this, but how far do your proposals require a full international agreement to be implemented? What would happen if there were only a partial agreement?"

"Dear Jeffrey,

Thank you for the inspiring presentation this morning. The UNFCCC talks really benefit from such truth-telling workshops.

You mentioned that the world would need to find a way to move forward on carbon pricing despite resistance by the US and a few other high-revenues countries. I was wondering if you would see this taking place at the UNFCCC (and if so, how) or outside of this framework in other forms of multilateral cooperation. Do you see any opportunity for willing countries to move forward within the frame of the UNFCCC and related instruments without aiming systematically at the lowest common denominator to keep the US and other resisting countries onboard?

Thank you so much in advance for any insights, Kind Regards,

Sebastien"

"With all this talk of private finance flows towards climate action (which will mostly be geared towards mitigation) how do you think they fit into your your key for long-term climate finance. They have higher revenues than the GDPs of a few countries but in-transparent in their dealings. How can private finance be tracked? How can they be brought into a system that is more accountable and has a compliance mechanism.

Also, what do you think are the most promising innovative sources for climate finance? Which combine some elements of raising revenues from the private sector channeled through national treasuries."

"Dear Prof Sachs

Thank you for an inspiring presentation. Convincing idea to raise international funding for incremental costs based on a formula with CO2 and GDP as parameters. This is actually what the Swiss government used to calculate its share of fast-start finance contributions.

Three questions regarding your proposals;

• is there a paper version?
• why do you apply fixed categories for the GDP factor, why not a continuous assessment, which would be less sensitive to small differences in GDP?
• If the US is not ready to join this tax, would it sensitive to start with a "ooalition of the willing"" and later convince the others to join or would this lead to a ""lock-in"" situation?

Your idea has actually quite a lot in common with the attached 2008 proposal for a global CO2 tax that exempts the first 1.5 tonnes from the tax (to take into account the situation of the least developed countries).

Yours sincerely Martin Stadelmann"