As the 2013 UN climate negotiations draw to a close, it is unclear whether we are any closer to a binding, multi-national agreement to reduce carbon emissions.

In an article published in the Guardian today, Tony de Brum, the minister-in-assistance to the president of the Republic of the Marshall Islands; Mary Robinson, the former president of Ireland; and Kelly Rigg, executive director of the Global Call for Climate Action, a network of more than 400 NGOs, said that “if ministers leave the UN climate talks in Warsaw this week without a clearly defined roadmap to accelerate the transition to a low-carbon world economy, our window of opportunity will become smaller yet again.”

De Brum, Robinson and Brigg added: “Ministers in Warsaw should have two broad tasks in mind: finding ways to more urgently reduce emissions, and building political momentum to ink a new global agreement in 2015. But this agreement will not come into effect until 2020, and the temptation to delay action is seemingly too much for some to resist.”

The ultimate objective, they said, was to ensure that global carbon emissions peak and are moving downward by 2020.

New York City-based Democracy Now, which is the only local media outlet broadcasting daily from the talks has reported that representatives of 133 developing countries, along with numerous NGOs, have walked out in the last 36 hours.

Democracy Now reported that the representatives from developing countries walked out of negotiations in Warsaw “amidst a conflict over how countries who have historically emitted the most greenhouse gases should be held financially responsible for some of the damage caused by extreme weather.”