It's a little more complicated than that: https://skepticalscience.com/climate-change-global-warming.h...
Barrett and Gast published a letter in Science in 1971 entitled simply 'Climate Change'. The journal 'Climatic Change' was created in 1977 (and is still published today). The IPCC was formed in 1988, and of course the 'CC' is 'climate change', not 'global warming'.
Lutz proposed this as a PR method during the Bush administration.