As day two of the climate summit hosted by United States President Joe Biden got under way, a question raised by special envoy John Kerry about carbon-reduction pledges by the nations gathered was still looming large. “Is it enough?” the veteran US negotiator had asked rhetorically at a White House press conference on the summit’s opening day on Thursday. “No,” Kerry himself answered matter-of-factly. “But it’s the best we can do today and prove we can begin to move [forward].” Kerry explained afterwards that 20 of the biggest countries at the summit represent 81 percent of global emissions, and that their commitments reflected “environmental justice, equity and fairness”.