Jennifer Marohasy (born 1963) is an Australian biologist, columnist and blogger. She was a senior fellow at the free-market think tank the Institute of Public Affairs between 2004 and 2009 and director of the Australian Environment Foundation until 2008. She holds a PhD in biology from the University of Queensland. She is sceptical of anthropogenic global warming and co-authored a peer-reviewed paper in suggesting that most of the recent warming is attributable to natural variations, a view disputed by climate scientists.