What is the fine-grained topic of the following text: “We believe the claims by NASA and GISS [NASA Goddard Institute for Space Studies], that man-made carbon dioxide is having a catastrophic impact on global climate change are not substantiated, especially when considering thousands of years of empirical data … it is clear that the science is NOT settled.” the group wrote, requesting that NASA refrain from mentioning CO2 as a cause of global warming in future press releases and websites. Only return the topic.
Disagreement with NASA's stance on carbon dioxide's impact on global climate change