Really.
Climate science is based totally on computer models, not on classic experimental research design using control groups and laboratory testing. These computer models are a second rate methodology. They are prone to many problems with regard to validity and reliability, research design, data quality, and interpretation of results. Given the complexity of the earth’s climate, these models are not currently capable of generating precise and reliable predictions of future climate change trends. There are too many untested assumptions that are built into these models.