Denial of anthropogenic global warming (AGW) comes in a variety of flavors. While i’ve come across several taxonomies, the most elegant (and, so far as i know, the only one necessary) classifies AGW denialists into three camps:
- Global temperatures are not rising.
- Global temperatures are rising, but not because of human activity.
- Human activity is causing global temperatures to rise, but this is not a big problem / we can’t do anything about it.