It's important to realise that substantial climate change has already been
recorded in parts of the USA in recent decades, as in some other parts of
the world.
As the first generations to have had so much data and the resources to study
it, we are privileged to be able to know about what has already happened to
birds (and much else in the biosphere) associated with such phenomena. The
enormous impacts of land-clearing on Australian birds is another
well-established fact for this International Year of Biodiversity.
This is quite separate from any debates about humans causing climate change
and views about future climate change.
But, let's face it, there is a "War on Science" in which denialists
encourage irrational (not evidence-based) mockery of sound science and its
predictions about the impacts of some humans on the rest of the biosphere
(including other humans). See Clive Hamilton's recent articles on the ABC's
Drum for the way these attacks are orchestrated.
I also recommend Professor Stephan Lewandowsky's Climate debate: opinion vs
evidence http://www.abc.net.au/unleashed/stories/s2842091.htm.
And for a commentary on the fallacies in some major denialist arguments:
http://www.newscientist.com/article/dn11462-climate-change-a-guide-for-the-perplexed.html
Michael Norris
Melbourne
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www.birding-aus.org
birding-aus.blogspot.com
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