How many pens have you used in your lifetime? One hundred? One thousand? Ten thousand? (Maybe.) Most if not all of those discarded tubes of metal, plastic, and ink remnants are sitting landfills, leaking chemicals, with no intention of biodegrading for thousands of years.
Now, however, there's the DBA 98 Biodegradable Pen (the 98 stands for 98 percent biodegradable). According to Core77, "it's produced at a wind-powered facility, uses ecological packaging and non-toxic ink, and is manufactured from a compostable bio-plastic,"—and it apparently writes quite nicely. Just because you want your written words to live on forever, doesn't mean your plastic has to.