Conservative think tanks since the 1990s have opposed the concept of man-made global warming; challenged scientific evidence; publicized what they perceived as beneficial aspects of global warming, and asserted that proposed remedies would do more harm than good. The concept of anthropogenic global warming continues to be an ongoing debate among conservatives in the United States, but most conservatives reject the scientific consensus that climate change is caused by humans. A 2019 poll showed that fewer than 25% of Republicans believed humans were involved in causing global warming.
