Thursday was a dreary day. A weary dispirited calm has descended on the RioCentro Conference Center where the Rio +20 Earth Summit is being held. Even the frantic chirping from the environmentalist choir of doom was muted. Nevertheless, officials from more than 190 countries, including more than 100 heads of state or government, continue to take the podium in the plenary session to read their 15-minute statements in favor of sustainable development. As the conference slouches toward its pointless conclusion, Reason Science Correspondent Ronald Bailey reports that the big news is that there is no news. And that's a good thing for humanity and the planet.