Pentel

Recycology products are made from a minimum of 50%, and up to 100%, recycled content or post-consumer recycled content. This environmentally responsible line of products includes pens, markers, pencils, lead, and tape
[Source 2008][More on Environmental Claims]

Ain Supplio pencil lead from Pentel uses nanotechnology to release allegedly mind-expanding aromas. The fragrance is encapsulated using nanotechnology, where microscopic bubbles containing the fragrance are blended in with the lead. When you write, the fragrance pops out of the tiny nanocapsules.
[Source 2007][More on Product Safety]