Source: http://www.bbc.co.uk/news`
By Matt McGrath
A
landmark report from IPCC (Intergovernmental panel on climate change) says scientists are 95% certain
that humans are the “dominant cause” of global warming since the 1950s.
The report
by the UN’s climate panel details the physical evidence behind climate change. On
the ground, in the air, in the oceans, global warming is “unequivocal”, it
explained. It adds that a pause in warming over the past 15 years is too short
to reflect long-term trends.The panel warns that continued emissions of
greenhouse gases will cause further warming and changes in all aspects of the
climate system. To contain these changes will require “substantial and
sustained reductions of greenhouse gas emissions”.
After a
week of intense negotiations in the Swedish capital, the summary for policymakers
on the physical science of global warming has finally been released.
The first
part of an IPCC trilogy, due over the next 12 months, this dense, 36-page
document is considered the most comprehensive statement on our understanding of
the mechanics of a warming planet.
It states
baldly that, since the 1950s, many of the observed changes in the climate
system are “unprecedented over decades to millennia”.
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