Your right that this alone isn't the solution. However, dealing with waste in this way is something we have to start doing. For too long we have thrown waste away. However, this waste does go somewhere and something does have to be done with it. If it's put in a landfill, it's only taking up space. Worse, it's contaminating an area of land (or sea) that causes further problems. In a reply before yours, someone suggested a complete cycle for the by products - you make wine, the waste is used to make fuel. From the waste of this process, you can make fertilizer. Cycles such as that mean that you have no waste at all. Obviously we can't apply this to every circumstance where waste is produced. However, where you can, it seems to me to be worth the effort. More than ever, with resources becoming more scarce, we have to accept the idea that something isn't waste as such but simply a by-product that has potential for further use.