After two weeks of negotiations here in the airport hangars of Le Bourget, 195 parties are expected to sign a global pact that will curb global warming pollution and rapidly escalate the growth of the clean energy solutions the world needs.

The consensus here is that the Paris deal on the table is a good one. Could it be better? Of course. But this deal is about as good as it is going to get from a consensus process involving 195 countries.

The reduction targets in the plan are in line with what scientists say needs to happen, and most importantly this deal strikes a balance between what has to happen to avoid the most calamitous impacts of climate change, with the realties faced by developing nations that do not have the resources to go it alone in reducing fossil fuel consumption.

On a personal note, having now been involved in this UN negotiating process in various capacities for close to a decade, I have to say that this is truly an historic day for humanity.

It has been a very long road that started long before these talks here in Paris.

The Long History of Climate Negotiations

While this official UN process began 21 years ago, it was in 1988 when a panel of scientists was struck called the Intergovernmental Panel on Climate Change (IPCC), bringing together everything we knew about climate change in a series of papers that would serve as the justification for a global treaty on greenhouse gas emissions. Over the coming years, the IPCC would issue reports on the state of climate science that grew more certain in its conclusions and more dire in it predictions.

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