Thoughts on what you can do about ecological degradation and sustainability.
There are usually tooth powders and other less packaged options at our Whole Foods store. You might look into those! Also, I've seen recipes for making a baking-soda BASED tooth powder at home, and there were other ingredients so that you weren't using straight baking soda. I will go see if I can find it for you!
How about clay? http://www.keeperofthehome.org/2012/10/homemade-clay-toothpaste.html