UN climate summits produced little despite twenty years

Evidence

As previously explained, the annual UN climate summits are an unwieldy mechanism for effecting change. They morphed into a predictable scenario combining ambitious goals with vague, unbinding pledges that are usually hammered out in a marathon session on the final day of the meetings and that defer corrective action to the next summit (Broder, 2012). Twenty years of summitry have produced little to show for it. — Albert Bandura, Moral Disengagement, 2929