Koalas are under threat from climate change because rising temperatures and carbon dioxide levels will affect the availability of their food, an Australian scientist has warned.
Ian Hume, of the University of Sydney, said his team had found, in laboratory experiments, that increases in carbon dioxide levels could reduce the amount of available nutrients and increase the amount of toxins in eucalyptus leaves.
Koalas were very fussy eaters, and some species of eucalyptus were already close to a threshold below which they would not contain enough goodness for the marsupials to feed on.
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