= Energy Scales =

||<)>                                         Terawatts ||  watts ||                                    ||
||<)>                                                 4 || 4.0E12 || United States technological, 2011  ||
||<)>                                                14 || 1.4E13 || World technological, 2011          ||
||<)>                                                50 || 5.0E13 || World technological, 2050 est      ||
||<)>                                               200 || 2.0E14 || World, "edible" biomass production ||
||<)>                                               500 || 5.0E14 || US insolation, December minimum    ||
||<)>                                            20,000 || 2.0E16 || World plants ( 99% land )          ||
||<)>                                            38,000 || 3.8E16 || World land insolation              ||
||<)>                                           170,000 || 1.7E17 || World stratosphere insolation      ||
||<)>                               380,000,000,000,000 || 3.8E26 || Solar output                       ||
||<)>                40,000,000,000,000,000,000,000,000 || 4.0E37 || Galaxy output                      ||
||<)> 4,000,000,000,000,000,000,000,000,000,000,000,000 || 4.0E48 || Observable universe output         ||

Goal: 10kw/person, 10 billion people (100TW), 1 million years

Stretch goal:  fill solar system, galaxy, and universe with life

Coal/gas/oil?  No way. 

Biomass:  Polluting, destroys unseen material cycles, consumes all of nature.  Worse than fossil fuels.

Terrestrial Solar:  displaces nature, requires US sized area, efficient planetary power grid, terawatt-scale storage.  Maybe.

Terrestrial Nuclear:  1 billion year supply, no competition with biosphere, but incompatible with sensationalistic journalism.  Maybe.

Space Solar:  Vastly more energy available, no competition with biosphere, leads to vast expansion of biosphere.  YES!