Quality assessment of products - Environmentally Friendly Products

In my thesis I would like to show how to reduce negative impact on the environment that is caused by for example corporations. I insist on the system of ecolabelling in the Czech Republic. But I also pay attention to others voluntary instruments of environmental policy (to concrete the situation I will mention the most important legal standards about environmental legislation, that enable at least a bit of protection of the environment). The basic quiestion and goal of my thesis is to find out, in which aspects the "common" products has changed their character, what is their development that we could call them these days "environmentally friendly" products, where is their "friendship". Other important thing is to tell which groups of products I will judge: paper, environmentaly friendly cars, detergents