It pleases me that fountain pens are a good choice for the environment, but I’ll admit that has nothing to do with my choice to use them.  Here’s one item listed in the article cited:

‘Little Deeds’ to save the earth

*  Why don’t we use fountain pens any longer? Throwaway pens are convenient, sure, but how many have we tossed in the trash? Invest in a fountain pen (which can be refilled) and not only will you be reducing waste, but your writing ventures will be a more pleasant experience.

http://www.sierrastar.com/2015/10/13/75463/little-deeds-to-save-the-earth.html