James Taylor, a senior fellow at Heartland, an Illinois-based group that dismisses climate change, said it is encouraging well-rounded classroom discussions on the topic. The group, which in 2017 sent thousands of science teachers copies of a book titled "Why Scientists Disagree About Global Warming," is now taking its message directly to students. A reference book it is planning for publication this year will rebut arguments linking climate change to hurricanes, tornadoes and other extreme weather.