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Global warming is speeding up, scientists reveal

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Earth’s temperature is likely to jump nearly 6 degrees between now and the end of the century even if every country cuts greenhouse gas emissions as proposed, according to a United Nations update.

Scientists looked at emission plans from 192 nations and calculated what would happen to global warming. The projections take into account 80 percent pollution cuts from the U.S. and Europe by 2050, which are not sure things.

The U.S. figure is based on a bill that passed the House of Representatives but is running into resistance in the Senate, where debate has been delayed by health care reform efforts.

Carbon dioxide, mostly from the burning of fossil fuels such as coal and oil, is the main cause of global warming, trapping the sun’s energy in the atmosphere. The world’s average temperature has already risen 1.4 degrees (0.8 degrees Celsius) since the 19th century.

Much of projected rise in temperature is because of developing nations, which aren’t talking much about cutting their emissions, scientists said at a United Nations press conference Thursday. China alone adds nearly 2 degrees (1 degree Celsius) to the projections.

“We are headed toward very serious changes in our planet,” said Achim Steiner, head of the U.N.’s environment program, which issued the update on Thursday.

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Even if the developed world cuts its emissions by 80 percent and the developing world cuts theirs in half by 2050, as some experts propose, the world is still facing a 3-degree (1.7 degree Celsius) increase by the end of the century, said Robert Corell, a prominent U.S. climate scientist who helped oversee the update.

Corell said the most likely agreement out of the international climate negotiations in Copenhagen in December still translates into a nearly 5 degree (2.7 degree Celsius) increase in world temperature by the end of the century. European leaders and the Obama White House have set a goal to limit warming to just a couple degrees.

The U.N.’s environment program unveiled the update on peer-reviewed climate change science to tell diplomats how hot the planet is getting. The last big report from the Nobel Prize-winning Intergovernmental Panel on Climate Change came out more than two years ago and is based on science that is at least three to four years old, Steiner said.

Global warming is speeding up, especially in the Arctic, and that means that some top-level science projections from 2007 are already out of date and overly optimistic. Corell, who headed an assessment of warming in the Arctic, said global warming “is accelerating in ways that we are not anticipating.”

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WATCH: Trump stops ABC film crew to restart interview after his chief of staff coughed

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President Donald Trump was very displeased when his chief of staff had the audacity to cough or sneeze during his interview with ABC's George Stephanopoulos. The full interview finally aired on "20/20" Sunday, showing the president in the Oval Office and outside in the Rose Garden.

The ABC interview showed the moment where Mick Mulvaney coughed, and Trump stopped the interview abruptly.

The two were discussing why Trump wouldn't release his taxes.

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Trump spends ABC interview trying to discredit Robert Mueller as ‘conflicted’

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President Donald Trump spent most of his interview with George Stephanopoulos blasting Special Counsel Robert Mueller, while he incorrectly quoted the report he published.

"I don't care what he says. It doesn't matter," Trump said when Stephanopoulos cited the Mueller report. "He wanted to show everyone what a good counsel he was. Now, he may have gotten confused said with that fact that I've always said, 'Robert Mueller was conflicted. He had numerous conflicts. One of them was the fact that he applied for to job to be the FBI director -- the head of the FBI. And, by the way --"

Stephanopoulos stepped in to say that former top aide Steve Bannon said that it never happened.

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Donald Trump whines: ‘My life has always been a fight’

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The full interview with President Donald Trump finally aired on ABC Sunday, revealing the shocking way that he views his life.

Trump lamented that he's had such a hard life, as the son of multi-millionaires who paid to get him out of trouble multiple times.

"You're a fighter. You, you, it feels like you're in a constant kind of churn--" host George Stephanopoulos began.

"Yeah, uh, my life has always been a fight," Trump said. "And I enjoy that I guess, I don't know if I enjoy it or not, I guess -- sometimes I have false fights like the Russian witch hunt. That's a false fight. That's a made-up, uh, hoax. And I had to fight that."

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