As you read through this guide (I hope you enjoy the pictures!), you'll find links like this one you just clicked. Most of these bring up little windows like this which gives you a bit more information. You can drag these little popup windows about if you want to, and also resize them if you wish. You'll find special links like this one. In some of these popups, you'll also notice numbers like this: [2]. If you scroll to the bottom of the window, you'll see that these simply tell you where I found out about things. (Dates are Day/Month/Year followed by the page number so you can find the original information if you want to.) At the end of this guide, you'll find a link to a page which tells you about other good places on the Internet to visit where you can find out more about pollution (if you still want to) or get started in doing something about it.