So far, 96 countries, accounting for just over two thirds of the world's greenhouse gas emissions, have formally joined the accord which seeks limit global warming to 2 degrees Celsius (3.6 degrees Fahrenheit). Many more countries are expected to come aboard the coming weeks and months.
U.N. spokesman Stephane Dujarric said Secretary-General Ban Ki-moon plans to commemorate "this historic day for both the people and the planet" by holding a conversation on Friday with civil society organizations about how they can contribute to the objectives of the Paris agreement.
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