[greenf]

I agree, keep it simple. Even a bullet point list with all the things that you do is a good starting point and you may want to include aims/objectives that you would like to implement in the future too as this shows you are continually looking to make improvements.

I suppose Tesco's has an environmental and ethical policy of some sort and could prove that they are doing x,y and z to reduce their carbon footprint etc but if you do keep keep your policy simple and honest and include a range of steps you take hopefully consumers will be able to see that you really are green and not green washing.