The next time you're thinking of buying a new pen, try purchasing a pencil instead. The millions of pens that are used everyday require a lot of plastic to manufacture, and it is usually difficult or impossible to recycle. This results in a lot of waste that doesn't easily break down. Although I'm a big fan of pens, I recently realized I don't have to write everything down in ink, and can choose to use a regular lead pencil or colored pencil instead. If you absolutely need to use pens, buy the ones where the ink cartridges are replaceable, or buy from companies that make their pens out of recycled plastic.