Reuters
UN: Climate Change Fight Affordable
November 02, 2014 1:25 PM 
COPENHAGEN—Governments can keep climate change in check at manageable costs but will have to cut greenhouse gas emissions to zero by 2100 to limit risks of irreversible damage, a U.N. report said on Sunday.
The 40-page synthesis, summing up 5,000 pages of work by 800 scientists already published since September 2013, said global warming was now causing more heat extremes, downpours, acidifying the oceans and pushing up sea levels.
“Science has spoken. There is no ambiguity in the message. Leaders must act, time is not on our side,” U.N. Secretary-General Ban Ki-moon said in presenting the report in Copenhagen that is meant to guide global climate policy-making.
With fast action, climate change could be kept in check at manageable costs, he said, referring to a U.N. goal of limiting average temperature rises to 2 degrees Celsius (3.6 degrees Fahrenheit) above pre-industrial times. Temperatures are already up 0.85 C (1.4F).
The study by the Intergovernmenal Panel on Climate Change (IPCC), approved by more than 120 governments, will be the main handbook for negotiators of a U.N. deal to combat global warming due at a summit in Paris in December 2015.
To get a good chance of staying below 2C, the report’s scenarios show that world emissions would have to fall by between 40 and 70 percent by 2050 from current levels and to “near zero or below in 2100.”
Below zero would require extracting carbon dioxide from the atmosphere – for instance by planting forests that soak up carbon as they grow or by burying emissions from power plants that burn wood or other biomass.
Renewables, nuclear
To cut emissions, the report points to options including energy efficiency, renewable energies from wind to solar power, nuclear energy or coal-fired power plants where carbon dioxide is stripped from the exhaust fumes and buried underground.
But carbon capture and storage (CCS) is expensive and little tested. Last month, Canada’s Saskatchewan Power opened the world’s first big CCS unit at a coal-fired power plant after a C$1.35 billion ($1.21 billion) retrofit.
“With CCS it’s entirely possible that fossil fuels can be used on a large scale,” IPCC chairman Rajendra Pachauri said. In most scenarios, the report says “fossil fuel power generation without CCS is phased out almost entirely by 2100.”
Without extra efforts to cut emissions, “warming by the end of the 21st century will bring high risks of severe, widespread, and irreversible impacts globally,” the IPCC said.
“Irreversible” could mean, for instance, a runaway melt of Greenland’s vast ice sheets that could swamp coastal regions and cities or disruptions to monsoons vital for growing food.
“The cost of inaction will be horrendously higher than the cost of action,” Pachauri said.
Deep cuts in emissions would reduce global growth in consumption of goods and services, the economic yardsstick used by the IPCC, by just 0.06 percentage point a year below annual projected growth of 1.6 to 3.0 percent, it said.
So far, major emitters are far from curbs on emissions on a scale outlined by the IPCC. China, the United States and the European Union are top emitters.
John P. Holdren, Director of the White House Office of Science & Technology Policy, said the report was “yet another wake-up call to the global community that we must act together swiftly and aggressively in order to stem climate change.”
“We must safeguard the world for future generations by striking a new climate deal in Paris next year,” British Secretary of State for Climate and Energy Ed Davey said.
Environmental groups welcomed the report, including its focus on zero emissions. “This is no longer about dividing up the pie. You need to get to zero. At some stage there is no pie left for anyone,” said Kaisa Kosonen of Greenpeace.
The report also says that it is at least 95 percent sure that manmade emissions of greenhouse gasses, rather than natural variations in the climate, are the main cause of warming since 1950, up from 90 percent in a previous assessment in 2007.
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Deal Reached at UN Climate Talks
Last updated on: December 14, 2014 12:18 PM. United Nations chief Ban Ki-moon says that a global climate change agreement reached Sunday in Peru sets the stage for a “universal and meaningful” deal next year, even as environmental groups attacked the Lima pact as weak.
The U.N. secretary-general praised the outcome of the Peru conference, while urging countries across the globe to engage in “substantive negotiations” ahead of another climate change meeting, in Paris in late 2015.
Ban said the world’s major economies need to submit their “ambitious national commitments” for controlling pollution well in advance of the Paris meeting.
The Lima agreement was adopted hours after earlier drafts were rejected by developing countries who accused wealthy nations of shirking their responsibilities to fight global warming and pay for its impacts.
The final draft apparently alleviated those concerns with language saying countries have “common but differentiated responsibilities” to deal with global warming.
Environmental groups attack pact
But environmental groups said the Peru pact was watered down. World Wildlife Fund climate expert Samantha Smith called the Lima deal “incredibly weak.”
“This is an incredibly weak text,” she said. “The parties have got just through something that is going to lead to all voluntary submissions of information, all voluntary ideas from countries about what kinds of emissions, reductions they want to make. And the big picture is, when they’re done, it’s going to be very hard to know if we’re actually able to avoid dangerous climate change or not.”
Delegates had been wrangling over contents for a final draft since Friday when the conference was scheduled to end. Peruvian environment minister Manuel Pulgar Vidal acknowledged that the final text was not perfect.
“Allow me to tell you all that as with all texts, this is not perfect, but it respects the positions of the parties, and aims to be a product of its own, which is one that is based on what has been proposed to the president of COP. And with this text, we all are winners, no exceptions. I have heard from all of the groups and I have the absolute assurance that with the text we are to receive, we are all winners,” said Vidal.
Compromise text
U.S. climate change envoy Todd Stern had warned deadlocked delegates Saturday that failure to reach an immediate compromise on carbon pollution standards could doom chances for a global pact at the Paris summit.
Stern urged delegates to accept a compromise text, and warned that failure to do so would damage the overall credibility of U.N. efforts to slow climate change.
The Paris treaty envisioned for next year would replace the Kyoto Protocol – the global agreement on cutting greenhouse gas emissions that expired in 2012.
Greenhouse gases are blamed for causing global temperatures to rise. Scientists warn that more extreme droughts, floods and rising seas are on the way unless the emissions are reduced.
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