Jamie is a scary person! Soylent green.
The value of Human life and the creativity of the individual is the renewable resource. Although human population growth is a major concern, the reality is that educated Countries have decreasing native born populations, and growth is maintained by immigration. As for resource demand, the United States it the most efficient and cleanest Nation on Earth, none are even close! The Problem we do have is that not enough of our students are pursuing careers in science & engineering. The best energy value of human embryos is that they be raised to appreciate the value of those fields, and perhaps one will be the person who discovers or develops the next leap in resource technology or energy efficiency.
As for me, I think we have a great opportunity in BioDiesel from algae. We need more people looking into this source, as a diesel replacement could ultimately replace half of our energy demand we currently get from fossil fuel.
Good Luck, and watch out for Jamie!