The Woody ballpoint by Goodkind Pens (above) is a very green writing option. The barrel and cap are made of natural, sustainable wood and a bit of black hardware, and the pen is refillable, reusable and biodegradable. They’re $4.49 each at The Green Office. There is also a retractable ballpoint pen with plastic parts made of recycled materials for sale at Red Apple Supply. A dozen costs $18.