The latest report from the U.N. Intergovernmental Panel on Climate
Change (IPCC) says the effects of warming are being felt everywhere,
fuelling potential food shortages, natural disasters and raising the
risk of wars.
"The world, in many cases, is ill-prepared for risks from a changing
climate," the IPCC said on Monday, after the final text of the
report was agreed.
More warming increased the chance of harsh, widespread impacts that
could be surprising or irreversible, it added.
The report projects global warming may cut world economic output by
between 0.2 and 2.0 percent a year should mean temperatures rise by
2 degrees Celsius (3.6 Fahrenheit), estimates that many countries
say are too low.
"Over the coming decades, climate change will have mostly negative
impacts," said Michel Jarraud, Secretary-General of the World
Meteorological Organization (WMO), citing cities, ecosystems and
water supply as being among the areas at risk.
"The poor and vulnerable will be most affected," he added.
The IPCC was set up in 1988 by the WMO and the United Nations
The report emphasizes the risks, and portrays cuts to greenhouse gas
emissions as an insurance policy for the planet.
"Climate change is really a challenge of managing risks,"
Christopher Field, co-chair of the IPCC group preparing the report,
told Reuters before its release on Monday.
The risks range from death to disrupted livelihoods in low-lying
coastal zones and small islands, due to storm surges, coastal
flooding, and sea-level rise, the report said.
Immediate action is needed, says the report, which follows a warning
that humans are probably responsible for global warming thought to
cause droughts, colder weather and rising sea levels.
"Unless we act dramatically and quickly, science tells us our
climate and our way of life are literally in jeopardy," U.S.
Secretary of State John Kerry said in a statement. "Denial of the
science is malpractice."
Still, many governments have pleaded for greater scientific
certainty before making billion-dollar investments in everything
from flood barriers to renewable energies.
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"There are those who say we can't afford to act. But waiting is
truly unaffordable. The costs of inaction are catastrophic," Kerry
Global warming will worsen health threats, damage crop yields and
bring floods, the report says. It could also deepen poverty and
worsen economic shocks at the heart of conflict.
The report is the
second in a four-part IPCC series meant to guide governments that
have promised to agree a pact in 2015 to slow climate change. The
first, in September, raised to least 95 percent the probability that
most global warming is man-made, from 90 percent in 2007.
The panel's credibility faces scrutiny after one of its reports, in
2007, exaggerated the melt of Himalayan glaciers, but reviews said
the error did not undermine key findings.
Climate scientists say they are more certain than ever that mankind
is the main culprit behind global warming and warned the impact of
greenhouse gas emissions would linger for centuries.
The report pulls together the work of hundreds of scientists but
skeptics have been emboldened by the fact that temperatures have
risen more slowly recently, despite rising emissions.
One of the authors, Professor Richard Tol of Sussex University in
England, pulled out of the writing team last week, saying he thought
the report was too alarmist.
The United Nations urged governments to step up work for a deal to
fight climate change.
"This report requires and requests that everyone accelerate and
scale up efforts towards a low carbon world and manage the risks of
climate change," the United Nations climate chief, Christiana
Figueres, said in a statement.
(Reporting by Aaron Sheldrick and Chris Meyers;
editing by Richard Pullin and Clarence Fernandez)
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