Other authors who have used this subject matter include Liz Jensen, Tony White, and Sarah Holding. Literary critics and journalists have speculated about the potential influence of climate fiction on the beliefs of its readers. So far, the sole academic study found that readers of climate fiction "are younger, more liberal, and more concerned about climate change than nonreaders," and that climate fiction "reminds concerned readers of the severity of climate change while impelling them to imagine environmental futures and consider the impact of climate change on human and nonhuman life. However, the actions that resulted from readers’ heightened consciousness reveal that awareness is only as valuable as the cultural messages about possible actions to take that are in circulation. Moreover, the responses of some readers suggest that works of climate fiction might lead some people to associate climate change with intensely negative emotions, which could prove counterproductive to efforts at environmental engagement or persuasion."