Greenhouse gas emissions reductions are a so-called public
good. Using some simple examples, we will try understanding what that means and
why it is so hard to get public goods realized. After a short input presentation
on the theory of public goods and climate economics, we will engage into a
role-play where each participant takes the perspective of a major player (a
country, group of countries, industry, NGO, science, the press) and tries to
negotiate a simple climate deal with the others, followed by an extensive
discussion of what can be learned from this exercise.