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).
Some organisms, called autotrophs, can produce their own energy using sunlight through the process of photosynthesis. Others, like humans, need to eat food in order to produce energy. However, that is not the type of energy cells use to function.Instead they use a molecule called Adenosine triphosphate (ATP) to keep themselves going.The cells, therefore, must have a way to take the chemical energy stored in food and transform it into the ATP they need to function. The process cells undergo to make this change is called cellular respiration.ome organisms, called autotrophs, can produce their own energy using sunlight through the process of photosynthesis. Others, like humans, need to eat food in order to produce energy. However, that is not the type of energy cells use to function.