"In 2005, total worldwide energy consumption was 500 exajoules (5×1020 J) with 80 to 90 percent derived from the combustion of fossil fuels.
"Most of the world's energy resources are from the sun's rays hitting earth.
"Mostly thanks to the Sun, the world also has a renewable usable energy flux that exceeds 120 PW (8,000 times 2004 total usage), or 3.8 YJ/yr, dwarfing all non-renewable resources."
http://en.wikipedia.org/wiki/World_energy_resources_and_consumption
An obvious question is, "What is the most globally available, sustainable, efficient, and cost-effective way to maximize energy production from the Sun?" The answer appears to be " Cannabis (i.e. industrial hemp) agriculture." Growing biofuels abundantly, organically, in more soil and climate conditions to the greatest benefit of soils and other crops grown in rotation with it, Cannabis produces more energy per acre, sustainably, organically, than any other crop that also produces food from the same harvest.
So that means if we can maximize our use of solar energy, then we can eliminate dependence on fossil fuels.
Isn't that, by itself, a good enough reason to end Cannabis prohibition?