Is Climate Change what they say?

In Nottingham we are discussing the subject of 'climate change'.
The Earth is 4.5 billion years old and during its phenomenal epochs of existence the climate has changed naturally countless times.
We are constantly bombarded with documentaries, news reports & of course scientific modelling explaining how the human race is apparently 'speeding-up' climate change.
I'd like to hear everyone's views and get some substantial evidence from anyone with a STEM background.
All views welcome.