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==David Karoly as communicator==
In the Australian scene, Karoly is credited with standing up to [[Alan Jones (radio broadcaster)|Alan Jones]], a conservative and climate change denying Sydney radio commentator with the largest daily audience in that city of ca.150,000.
In doing so Karoly, originally a sceptic (1980), has earned the reputation of being a climate scientist communicator with the ability to explain the complexities of his research to the general public. On The Australian Broadcasting Commission's high ranking television program QndA wherein audience members can ask direct questions of experts, Karoly claimed his authority by stating in regard to his nemesis, “I am a climate scientist and Alan Jones is wrong.” <ref>{{cite web |title=Alan Jones is wrong |url=https://www.smh.com.au/entertainment/tv-and-radio/alan-jones-is-wrong-climate-scientist-tells-a-politician-free-q-and-a-20190618-p51yor.html |publisher=Sydney Morning Herald |accessdate=5 January 2020}}</ref><ref>{{cite web |title=Alan Jones is wrong |url=https://www.news.com.au/technology/environment/climate-change/alan-jones-is-wrong-radio-commentator-slammed-over-climate-change-remarks-on-qa-science-panel/news-story/765c558bb3a71c33a423f3458daff572 |website=news.com.au |publisher=News Limited}}</ref>
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Karoly pointed out that one hundred years ago carbon dioxide in the atmosphere was 280 parts per million whereas now it is 400 parts per million, an increase of 40% which he asserted was unquestionably caused by human activity. He also admonished Australians for producing 1.5% of the world's greenhouse gases when they were only 0.3% of the world's population.
On the population issue Karoly sounded a warning, i.e., "climate scientists in Europe have said that the long-term sustainable population of people on the Earth is about 1 billion people in 2100 – not the foreshadowed United Nations population estimates of about 10 to 12 billion people. That’s not good news."<ref>{{cite web |title=QandA |url=https://www.abc.net.au/qanda/2019-17-06/11191192 |website=abc.net.au |publisher=ABC -Australian Broadcasting Commission |accessdate=20 June 2019}}</ref>
==References==
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