You may not equate the two of these right off the bat, but when thinking about the ingredients, you’ll find they shouldn’t be treated as normal rubbish.  Take nail polish for example.  When you are done with it (empty or not), do you simply throw it in the rubbish bin? For most people, the answer is probably ‘yes’.  Unfortunately, this is the wrong answer.  Have a look at this interesting article for more information which also includes a link to other potential items that cannot be disposed of  or recycled normally: 

http://www.bellasugar.com.au/How-Dispose-Nail-Polish-8022400