I have been trying to be more environmentally conscious when choosing cleaning products. Trader Joes and Whole Foods have many options for just about anything. There are also many cleaners that you can make yourself. A recent shower drain clog went on a little too long because we resisted buying the toxic Draino. I found a solution on Green Home Living that worked.
Dissolve 1 cup baking soda and one cup vinegar in boiling water and pour down the drain. Continue to flush with hot tap water until the clog breaks.
They also have a lot of useful information about which Eco Friendly products actually work.