This is a BBC documentary series in three parts, presented by Professor Iain Stewart, which explores how battles have raged over climate over the last 40 years.

Back in the 70's, some scientists thought that the climate would cool - what went wrong with their calculations? Professor Stewart looks at what they missed and how their error set the stage for people to deny climate change was occurring.

He also recounts the history of how the Presidency of the USA decided to commission a secret study to independently verify whether climate change was happening and how to the governments surprise they confirmed AGW in 1979.

Episode 2 shows the history of the counter-attack - how climate change deniers sought to scupper global action to stop climate change. Iain Stewart examines the scientific hypothesis of the deniers to see if it has any merit.

Episode 3 deals with the models being used by climate scientists to determine the pace of climate change. Are they accurate, and is it true they are underestimating the pace of climate change? 

Related article: What adds CO2 to the atmosphere and what removes it?