In "Stewart and climate" (Forum, April 18), Bill Spiva claims that "many scientists," including him, suspect that climate change is not primarily man-caused. To date, no scientific body of national standing rejects the findings of primarily human-induced effects on the climate.
Moreover, all reliable surveys of scientists in academic, peer-reviewed journals indicate that about 97 percent of scientists agree that anthropogenic climate change is occurring. One of the latest surveys, a 2010 paper in the Proceedings of the National Academy of Sciences of the United States, reviewed publication and citation data for 1,372 climate researchers and drew the following two conclusions:
1. Of the climate researchers most actively publishing in the field, 97–98 percent support the tenets of anthropogenic climate change, and