As the Rio+20 Conference on the environment enters its last day, two things are certain. With its negotiated text finalised and awaiting formal approval by heads of state, the conference will not -- like the Copenhagen climate conference in 2009 -- run desperately over time, threatened by brinksmanship, courting collapse. Nor will it deliver anything of significance.

Rio+20 is a zombie summit, shuffling through its paces dead-eyed, toothless, empty-handed. It is a ritual that lacks a clear agenda or international commitment to action. Its 53-page, 283-clause draft text can rightly be criticised as a pastiche of platitudes winnowed of substance during pre-negotiations.