In the Tragedy of the Commons Hardin suggested that with respect to global commons we are trapped in a vicious circle where calculations of utility pushes us to keep polluting our own nest. This taken on a global scale has led to concerns about climate change and a realization that measures need...

The report analyzes, by looking back at existing compliance systems in the EU, Alberta, Australia, Colombia and Japan, the conditions under which offsets can add value to the compliance system without undermining its environmental integrity. The compliance system’s climate ambition as well as...