 In fact, it's looking at the individual impact that starts to link us into that third category, which is the socio-cultural factors. So part of our society and part of the way our society operates is also affected by things like our obtaining and use of fossil fuels. So there may be issues around mining for a start and so we have things like debates around fracking, the use of alternate power generation. So that would include things like renewables. It also includes things like targets for greenhouse and so global warming and climate change. Each of these is important factors and they're associated with the use of hydrocarbons and there are all things that we want to have a little bit of a look at in a bit more detail. I think if you've got a question that's related to this particular area, you want to make sure that you've got a number of different factors and you want to look at some specific examples too. So one nice one which we will be having a look at particularly when we look at polymers later in this particular module is ethene and it's not just that ethene is a gas at room temperature and therefore it's not a key component of something like crude oil but through processes such as cracking we can cut large hydrocarbons into smaller hydrocarbons and therefore increase our proportion of desired molecules like ethene which can then be started molecules for alcohols and a range of different polymers. Find some good supporting evidence to help you with each of these different areas and thanks for watching.