The news coming out from the Rio summit at the moment is that world leaders are backing an agreement which "reaffirms" the commitments made 20 years ago.
I suppose an agreement of any sort is good news but many European leaders are unhappy with the lack of ambition from the agreement. I don't know the details yet but I really hope there is more than just affirming promises of twenty years ago. Twenty years ago I was just learning to walk and talk, back in the 70s global environmental policy seemed to be doing the same thing. Hopefully we've made some progress in 20 years, we'll have to wait and see over the next few days if we have.