That's all the means of utilizing the energy, and they're all effective.
Where I disagree with you is that the resolution in question points directly and necessarily to the means of obtaining the energy from the source; where it really points to is the means of using that energy after you have obtained it. And that "overall" was taken out of context. The resolution does not say overall, but nor does it exclude that approach. Therefore, a reasonable interpretation of the target exists that does not cause problems for member nations.