So far he said 56 countries representing 61 percent of global green-house gas emissions have handed in their reduction pledges, just over a quarter of the total countries.

“Key G20 countries such as Argentina, Brazil, India, Indonesia, Saudi Arabia, South Africa and Turkey must submit their intended contributions without delay,” the Spanish commissioner said.
In March, the European Union, the world’s third biggest emitter, became one of the first blocs or countries to formally submit its pledge to the United Nations.

The second biggest polluter the United States and the number one emitter China have also submitted their pledges in the last few months.

Available at: http://phys.org/news/2015-08-eu-slams-economies-climate-summit.html