Dr Alexandra Hart has a PhD in behavioural sciences. Although her background is in integrative health dealing with illnesses such as Chronic Fatigue Syndrome, the Action model she developed is enormously relevant to the sustainability sector - even though there's been talk and policy about being sustainable, how come its not been happening? Not everyone is recycling, saving water or buying ethically. Dr Hart's model would say that to make it happen we need to START ACTING. But what needs to happen to make people act?

Also, Alexandra tells a fascinating story about her adventure an Astronomical Observatory!