At a February 13, 1992 press conference, scientists raised concerns in regards to a lack of policy decisions to address climate change at the 1992 Earth Summit, by the Bush Administration. https://en.wikipedia.org/wiki/Earth_Summit Many arguments from the time and issues over the political inaction to reduce emissions, and to enforce regulations, and to sign treaties, are still present today.
Full conference video https://www.c-span.org/video/?24392-1/administration-global-warming-policy
Rio+20: Earth summit dawns with stormier clouds than in 1992 https://www.theguardian.com/environment/2012/jun/19/rio-20-earth-summit-1992-2012
A CLOSER LOOK; Ecology, the Economy and Bush (1992 The New York Times)
Agenda 21 https://en.wikipedia.org/wiki/Agenda_21