Professor Iain Stewart concludes a landmark five-part series in which he reveals how Scotland's unique and beautiful landscape has been shaped over the centuries. br br During the Industrial Revolution, Scottish scientists and engineers helped unwittingly set off a chain of events that today we know as climate change - a process that is transforming our atmosphere and warming our planet. Professor Iain Stewart looks at how Scotland is on the verge of another revolution: the transformation of a carbon economy to a green one.