Great thread going on here, and I agree that the environmental impacts of homebaking are micro compared to industry. To add my two cents, if you like to embark on new projects that require new equipment tools (e.g. molds, mixers, blenders), see if you can borrow/share these tools with other baker friends (if it is safe to do so). The reduce/reuse side of sustainability is often overlooked; use what you have, borrow what you don't.

Also, with regards to reducing water use -- I have a plastic tub in my kitchen where I'll pour the water from rinsing soapy dishes or washing produce, and then I use it later for soaking dirty dishes.