There are some great  roofing options made from recycled product:

1. Steel roof last a life time.

These other shingle roof types put old waste to new use

1. Roofing tiles made of recycled rubber
2. Roofing tiles made of recycled plastics
3. Roofing tiles made of recycled tires

Recycled tires are my favorite because it can also help be a solution for a growing landfill problem  http://www.rubberroofingshingles.com/