... next year, when we get a really cold winter, people will start saying "what global warming".

That is why I prefer to use the term 'Global Climate Change.'  People get fixated on the gerund - "warming" - and forget the adjective - global.  "Global warming" as a Chaotic system means any particular geographical location could end-up being colder or warmer or the same.  The local affect is unknowable although it can be stated, with a high degree of confidence, climate is moving towards higher temperatures overall.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre