Here is Denis's latest round of objections to the general utility of ERoEI. (If there is any repetition, well, Denis does tend to repeat himself.)
- whether the energy supplied is used for a useful purpose or otherwise. Is all the fuel used by cars serving a useful purpose?
- that the supply process produces waste material that has caused such deleterious consequences as climate change and the accumulation of stores of radioactive materials
- that the supply process irreversibly divests limited natural material resources, including fossil fuels and uranium
- This is not the business of the analyst and it should not be. Can you imagine what most people would say if I told them that the energy they use to conduct their lives or businesses is wasted because I do not approve of what they are doing?
- This is included in the energy-invested term by including the cost of sequestration. Even the loss of space to sequestration can be given an energy value by counting the insolation that might have been harvested but could not be because the space was otherwise occupied.
- If the process does consume material resources, the energy-invested term can be increased by the energy cost to recycle not consume, which is always possible except for an insignificant trace amount. In some cases, this expense is unbearable and must be avoided by choosing different technology.