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 minimise or offset this in various ways:

Making:

Most of the clay I use comes from a supplier in Exeter (some of thier materials come 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 . It's 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:

For smaller loads, 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.
I have a large older kiln that is less efficiant, but more efficient than running two of the smaller kiln loads.
My electricity comes from a supplier with good renewables record.

Retailing

To minimise travel, I have moved away fomr regualr fairs and markets to being through galleries and a reduced number of exhiitions
When I pack for exhibitions and gallery deliveries I reccyle packaging materials (my neighbours keep me topped up when needed!) .
For direct customer purchases I use recycled tissue paper and paper carrier bags that can all be recycled.
I run pottery experience sessions from a rented space in the village, mainly catering to local populations, reducing the 'road miles' used by customers to enjoy the experiences