lbnl 44314 energy use and intensity of the us chemical industry ernst worrell dian phylipsen dan einstein nathan martin analysis department environmental technologies division ernest orlando lawrence berkeley national laboratory university california 94720 april 2000 this work was supported by climate protection office air radiation agency through under contract no de ac03 76sf00098 i abstract is largest in world responsible for about 11 industrial production measured as value added it consumes approximately 20 total consumption 1994 contributes similar proportions to greenhouse gas emissions surprisingly there not much information on available public domain report provides detailed major groups intensive products ethylene product