Okay, so it's not just a simple plug-and-play adjustment to that monster fossil fuel guzzler, but this tutorial from Appropedia - the sustainability wiki - actually seems like it'd work. It replaces the combustible...
It's in the 'bag'. The next time you are asked “paper or plastic?”at the local supermarket. Say “neither, we make and bring our own... A simple to make Eco Bag (DIY) can be made from hessian/jute...