Eco ?...

You can't get away from the fact that to fire pottery to make it durable, you need a kiln, and to buy materials that have to travel. I therefore try to offset this in various ways:

Making:

Most of the clay I use comes from a supplier in Exeter (they buy directly from the claypit company locally in Bovey). I also dig & process some local red clay which I use as a slip decoration on many of my items.
I use a lot of tools and studio equipment that I inherited a few years ago, as well as many oxides and other glazing materials. When I can, I source items and materials from other potters too when they are retiring or changing what/how they make etc. (The West Country Potters Association has an annual meeting opportunity for this)
Ceramics is a water heavy process, so I use rainwater from my studio roof, collected in water butts . Its used in glaze making and cleaning. I also recycle it throughout my cleaning process so its get several uses before being used (clean) to water to our garden.

Firing:

I use the latest in economical and efficient design of electric kiln, made by Rohde. It has extra insulation and therefore uses less energy to reach and stay at the necessary temperatures.
My electricity comes from a green energy supplier.

Retailing

To minimise travel, I generally sell locally, both through a local gallery and local events.
When I pack for shows I recycle bubble wrap and other packaging.
For customers purchases I use recycled tissue paper and paper carrier bags that can all be recycled.