Now, you’re concerned about climate change, and you know it’s caused by human activity. But the facts, figures and statistics can be bit elusive. And the climate deniers are well rehearsed at seeding confusion and miss-information.

This week we're going to give you a bit of a cheat sheet. We’ll be getting to the facts behind the climate science. We’ll hear about how is it studied, and what it is telling us about the present and our future.

We hear from Michael Mann, one of the foremost climate scientists in the world today. Perhaps best known for his pioneering work reconstructing temperatures of past centuries, demonstrating the rapid warming of the climate since the onset of the industrial revolution.