U.N. frustrated by climate efforts

BONN, Germany, April 1 (UPI) -- Though 75 nations signed commitments to cut greenhouse gas emissions by 2020, it isn't enough to limit global warming, U.N. officials said in Germany.

The United Nations said 75 nations pledged to limit their greenhouse gas emissions following a December climate change conference in Copenhagen, Denmark.

Yvo de Boer, the executive secretary of the U.N. Framework Convention on Climate Change, said those pledges, however, fell short of his expectations.

"It is clear that while the pledges on the table are an important step toward the objective of limiting growth of emissions, they will not in themselves suffice to limit warming to below 2 degrees Celsius," he said in his latest report.

Germany hosts the next round of UNFCCC talks starting April 9 followed by two weeks of negotiations.

De Boer called on world leaders to take the initiative at the next major climate conference November in Mexico.

"The climate conference at the end of this year in Mexico … needs to put in place effective cooperative mechanisms capable of bringing about significant acceleration of national, regional and international action both to limit the growth of emissions and to prepare for the inevitable impacts of climate change," he said.