Technology is certainly an important source of pollution, but as you rightly point out not only in the use and energy it consumes but also in the materials used for the different components, sometimes I think about where all the TVs, cell phone batteries and other equipment that are said not to be thrown away in the trash have gone and yet unconsciously we throw them away. If I remember correctly, the mercury contained in some of the electronic devices and their parts is a very potent poison and pollutant of lakes, rivers and seas. It is something to think about..