
List of figures
1.1 Worldwide energy generation (EIA, 2011). 2
1.2 Energy usage in oil equivalent (World Bank Database, May 2012). 2
1.3 Historic natural gas prices (EIA, June 2012). 3
1.4 Historic retail gasoline and diesel prices (EIA, June 2012). 4
1.5 West Texas Intermediate (WTI) spot oil prices from 1986 to 2012
(Thompson Reuters, 2012). 5
1.6 Historical coal prices (EIA, June 2012). 5
1.7 Historical polysilicon photovoltaic module cost breakdown
showing a 40% price decrease over 12 months (Source: data
from PVinsights.com, July 2012). 6
2.1 When light, also known as two photons, hit a crystal lattice
in a solar cell, it causes ...