1 Forecast of natural gas production worldwide from 2012 to 2040 (in trillion cubic feet)Global natural gas production forecast 2012-2040. 2  Projected natural gas consumption worldwide from 1990 to 2035 (in million metric tons of oil equivalent)World natural gas consumption. Natural gas prices in the United States and Europe from 1980 to 2030 (in U.S. dollars per million British thermal units)*U.S. and European natural gas price 1980-2030.
Phototrophic organisms convert light energy into chemical energy in the form of ATP. Photosynthetic organisms (photoautotrophs) also use light energy to make both ATP and reduced electron carriers (NADH or NADPH), which are both required to reduce carbon dioxide (CO2) to carbohydrate (CH2O).
The light-independent Calvin cycle uses the energy from short-lived electronically excited carriers to convert carbon dioxide and water into organic compounds that can be used by the organism (and by animals that feed on it). This set of reactions is also called carbon fixation.