PETROLEUM - the crisis you don't want to encounter

Imagine with me a world where we have used up all of the petroleum on the planet. Clothing designers will have to be once again creative with cotton, linen, silk and wool. Hand creams and foods will be healthier with all natural ingredients. Plastic bags will be replaced with paper and cotton, good riddance! But what about all of the other uses for plastic? Shoes. Tupperware. Computers?! Let's start conserving energy and petroleum today.