It is possible to make a number of the products currently made with oil-derived plastics with other things. Cellophane, bakelite, plastics derived from vegetable oils, coal. Alternatively metal, wood, or paper can be used for some products for which plastics are used now. All these need to be looked at in terms of cost-benefit analyses: there is no point in using wood if it takes a huge amount of energy to machine it to replace a plastic part. Design also plays a part, too, in that differences in design may mean less machining required, and so on.