Are you interested in proofreading feedback? 'Cause I've found a couple of errors already. First paragraph on page two: "In this guide I is an explanation..."
Third paragraph, same page: "you would not expect to see Bedouin tents in Arctic tundra any less than you would igloos in the desert"
That should read either "you would expect to see Bedouin tends in the Arctic tents even less than..." or "you would not expect to see Bedouin tents in Arctic tundra any more than..." The way it's phrased now makes it sound as though you should expect igloos in the desert.
No errors on page three (har har). If you'd prefer to keep your momentum going on new work, perhaps passing the document off to someone else to edit would be a good idea. Writing is fun, but revision is work, as they say. I'd volunteer my services, but I don't have software capable of editing pdf at the moment. I'm more than happy to keep proofreading, though, if it's helpful.