Air pollution related to greenhouse gases (GHGs) is a threat to the climate system, which is changing – a change that is bound to affect the survival of entire states and populations. The enclosure of the air has been inclusionary since it was realized that the reduction of emissions by some states will not do much to improve air quality or abate climate change if other states continue to pollute. The same is true with regard to the enclosure of the ozone layer, since the elimination of ozone-depleting substances (ODSs) by some states will be fruitless if other states continue to produce and consume ODSs. In the ozone and climate change regimes, developed countries have been willing to provide side payments to developing states for joining in and for outlawing ODSs and reducing their GHGs. Other issues examined in this chapter include: the politics of green energy transition in connection with the mining of rare earths and minerals and revival of nuclear energy, and the transboundary air pollution regime – an effective inclusionary enclosure.