error that may spell the end of the only planet in the universe known to support life professor simon lewis and reservoir maslin of the co-authors of the human planet how we created the other person and they join me in there thanks for coming in let's begin mark with what is the sea so many years ago scientists started to realize that we were changing the earth but we haven't realized until the last decade how much we're actually changing it so if we look at the amount of earth or soil that we move remove more than the rest of the natural processes if you think about the amount of concrete we make we can actually have covered the whole of the world two millimeters thick in concrete so all these massive changes and actually what we've realized is that we were entering a new geological period a period that wasn't dominated by plate tectonics or by super volcanoes but actually by us and so we are now controlling the destiny of the earth and clingfilm the book is full of the exclusion of the last six yes we hate plastic. simon this book dates it to sixty in ten i should say there are lots of ic