voices of Australia's climate change sceptics are again on the rise,

highlighting the disconnect between the scientific community and the

public and media perception of the damage inflicted by increasing levels

of CO2 in the atmosphere. Despite mounting evidence of global warming,

there are numerous reasons why sceptics have been able to stay in

denial, according to two University of New South Wales professors. Here

they pinpoint the difficulties in communicating the "diabolical problem"

and how to overcome them.