Peat. Don’t you just love it? Well, if you’re a hillwalker there’s a good chance that you don’t, because when it’s exposed at the surface or when it comes served with its standard topping of spongy luminous moss, it can be a thing of real anguish. It’s difficult to love something that swallows your feet, stinks to high heaven and whose acidic character hastens your boots’ demise. And yet peat is vitally important stuff, so when that soggy black morass makes the headlines (as it has done twice in the last month) it’s definitely worth taking notice. What is peat?…