Every country in the world signed onto a promise to take steps to keep global temperature increases "well below" 2☌ by 2100. The Paris agreement is an unusual hybrid of soaring ambitions and few enforcement mechanisms. But at the same time, he says, the pact has made a "real difference" by helping make climate change "a top concern of all countries." If a grade is awarded to the Paris pact "based on whether we have any prospect of meeting a 2☌ target, from that point of view, it's probably a D or an F," says Michael Oppenheimer, a climate scientist and policy expert at Princeton University. And even if nations had kept those promises, some researchers forecast that global temperatures would rise by 2.6☌ by the end of the century, underlining the need for stronger action.
Although analysts say the pact has helped make progress toward its goal of preventing average global temperatures from increasing by 2☌ above preindustrial levels, the effort is also shadowed by ample evidence that many countries aren't living up to the promises they made in 2015. That will be the implicit message sent tomorrow when nations gather-virtually-to look back on what the Paris agreement has achieved in its first half-decade and, more importantly, to unveil new pledges to further cut planet-warming emissions. Now, five tumultuous years later, a new slogan might be " travail en cours" (work in progress). When world leaders celebrated reaching a landmark climate change agreement in Paris in December 2015, the Eiffel Tower and Arc de Triomphe were illuminated with green floodlights and the message " Accord de Paris c'est fait!" (the Paris agreement is done!).
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