Complex sentence: As chairman of the CSIRO McKeon wants to see the issue of Climate Change elevated to the top of the political and public agenda, disputing the statement that the science is settled saying "We may not have all the answers to what is occurring".
Split into simpler sentences: As chairman of the CSIRO McKeon wants to see the issue of Climate Change elevated to the top of the political and public agenda. It is notable that he disputes the statement that the science is settled saying "We may not have all the answers to what is occurring".